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How Old Is My Dog in Human Years Calculator: Accurate by Size

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How Old Is My Dog in Human Years

Accurate size-adjusted human year conversion

Dog Age (years)

Dog Size

How Old Is My Dog in Human Years?

Understanding your dog’s age in human years helps you provide the right care at the right time. A 7-year-old large dog is the equivalent of a 54-year-old human — firmly in the mature stage, where bi-annual vet visits and joint health screening become important. Our calculator uses the veterinary size-adjusted formula for the most accurate conversion.

Human Year Equivalents at Key Ages

Dog Age Small Medium Large Giant
1 yr 15 15 15 15
5 yrs 38 39 42 47
10 yrs 60 64 72 85
15 yrs 83 89 102 124

FAQs

At what age is a dog considered old?

It depends on breed size. Small dogs are considered senior at 10-12 years, medium dogs at 8-10, large dogs at 7-8, and giant breeds at just 5-6. In human years, all of these roughly correspond to the 50-60 year range.

How do I know if my dog is aging well?

Signs of healthy aging: maintaining a lean body weight, clear eyes, clean teeth, good appetite, and interest in activity. Signs to watch for: unexplained weight loss or gain, increased thirst/urination, difficulty rising, cloudy eyes, or behavioural changes. Any of these warrant a vet visit.

Conclusion

Our how old is my dog in human years calculator gives you an instant, size-accurate result. For life stage nutrition, use our food calculator, and track health with our weight calculator.

Purina Calorie Calculator for Dogs: Daily kcal & Portions Guide

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Purina Calorie Calculator for Dogs

Find daily kcal needs and cup amounts for Purina products

Dog Weight (lbs)

Life Stage

Purina Calorie Calculator for Dogs

Different Purina products have significantly different calorie densities, meaning the same dog needs different cup amounts depending on which product you use. Our Purina calorie calculator for dogs calculates your dog’s daily calorie target and shows you the exact cup amount for Pro Plan, Purina ONE, and Dog Chow.

Purina Product Calorie Comparison

Product kcal/cup 50 lb adult dog
Pro Plan Adult ~355 ~2.8 cups/day
Purina ONE Adult ~293 ~3.4 cups/day
Dog Chow Adult ~314 ~3.1 cups/day
Beneful Original ~278 ~3.5 cups/day

FAQs

Does Purina have an official calorie calculator?

Purina provides feeding guides on their product packaging based on their own MER calculations. Our calculator uses the same veterinary RER formula that Purina’s nutritionists use, giving results consistent with — and often more precise than — the broad bag ranges.

Which Purina product is best for weight loss?

Purina Pro Plan Weight Management or Purina ONE Healthy Weight are specifically formulated for weight management, with higher fibre and lower calorie density. Purina also offers prescription weight loss diets through vets for dogs needing more significant caloric restriction.

Conclusion

Our Purina calorie calculator for dogs makes portioning easy across all major Purina products. For complete nutrition planning, use our dog food calculator and our weight loss calculator.

MER Calculator for Dogs: Maintenance Energy Requirement Guide

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MER Calculator for Dogs

Calculate your dog’s Maintenance Energy Requirement

Dog Weight (lbs)

Life Stage

What Is MER for Dogs?

MER (Maintenance Energy Requirement) is the total daily caloric intake a dog needs to maintain their current body weight, taking into account their lifestyle and life stage. It is calculated by multiplying the RER (Resting Energy Requirement) by a life stage factor: MER = 70 × (BW kg)⁰⋅⁷⁵ × life stage factor.

MER Factors by Life Stage

Life Stage Factor 50 lb Example
Adult neutered 1.0× ~985 kcal
Active adult 1.4× ~1379 kcal
Puppy (0-4 mo) 3.0× ~2955 kcal
Senior (7+) 0.9× ~887 kcal
Weight loss 0.8× (of ideal weight RER) Varies

FAQs

What is the difference between RER and MER?

RER is the energy needed at complete rest — the baseline metabolic floor. MER accounts for actual daily activity, life stage, and reproductive status. For a sedentary neutered adult dog, MER = RER. For a working dog or nursing mother, MER can be 2-3× higher than RER.

How do I use MER to choose a food portion?

Divide your dog’s MER by the calorie density of your food (kcal/cup from the bag label). For example, if MER = 1000 kcal/day and food is 380 kcal/cup, feed 1000/380 = 2.63 cups/day.

Conclusion

Our MER calculator for dogs gives you both the base RER and life stage-adjusted MER instantly. Use it alongside our dog food calculator and weight calculator for complete nutrition planning.

Dexamethasone Dog Dose Calculator: mg/kg Reference Guide

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Dexamethasone Dog Dose Calculator (mg/kg)

Reference dose calculator for dexamethasone in dogs

⚠️ Prescription only. Never administer dexamethasone without a valid veterinary prescription. This tool is for informational reference only.

Dog Weight (lbs)

Indication

Dexamethasone for Dogs: What You Need to Know

Dexamethasone is a potent synthetic glucocorticoid approximately 7-10 times more potent than prednisone. It is used in dogs for anti-inflammatory effects, immunosuppression, shock treatment, and CNS/cerebral oedema. Due to its potency, it requires careful dosing and monitoring.

Dexamethasone Dosage Reference

Indication Dose (mg/kg) Route
Anti-inflammatory 0.1-0.2 mg/kg PO, IM, IV
Immunosuppressive 0.5-1.0 mg/kg PO, IM, IV
Shock/Emergency 2-4 mg/kg IV only
Cerebral edema 1-2 mg/kg IV only

FAQs

Is dexamethasone stronger than prednisone?

Yes. Dexamethasone is approximately 7-10x more potent than prednisone on a mg-for-mg basis. This means the doses are much smaller. It also has no mineralocorticoid activity (unlike prednisone), making it less likely to cause sodium retention and fluid accumulation.

How long does dexamethasone last in a dog?

Dexamethasone has a long biological half-life of 36-72 hours, significantly longer than prednisone (12-36 hours). This means once-daily or every-other-day dosing is typical, and suppression of the adrenal axis can persist for days after the last dose.

Conclusion

Our dexamethasone dog dose calculator provides reference dose ranges — always follow your vet’s specific prescription. For routine health monitoring, use our weight calculator and calorie calculator.

How Old Is My Dog Calculator: Human Years by Breed Size

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How Old Is My Dog Calculator

Find your dog’s age in human years by breed size

Dog Age (years)

Breed Size

How Old Is My Dog? Understanding Dog Age

The old rule of multiplying your dog’s age by 7 is inaccurate. Dogs age rapidly in their first two years — a 1-year-old dog is already equivalent to a 15-year-old human. After that, aging slows down and varies significantly by breed size. Our how old is my dog calculator uses the size-adjusted formula accepted by veterinary nutritionists worldwide.

Dog Age to Human Years by Size

Dog Age Small Medium Large Giant
1 year 15 15 15 15
3 years 28 29 30 32
7 years 47 49 54 62
12 years 70 74 84 99

FAQs

How do I estimate my rescue dog’s age?

A vet can estimate age from teeth (eruption pattern, wear, tartar build-up), eyes (nuclear sclerosis appears around age 7), coat (grey muzzle typically from 5-7+), and joint condition. A DNA test from companies like Embark can also give a biological age estimate.

Is the ×7 rule accurate?

No. It is a rough average that ignores the fact that dogs age 15 human years in year one, 9 in year two, and then slow down. It also ignores the major difference in aging rate between small and giant breeds. Our size-adjusted calculator is far more accurate.

Conclusion

Our how old is my dog calculator gives you an instant, size-accurate human-year equivalent. For life stage nutrition, use our dog food calculator and for health tracking, our weight calculator.

Dog RER Calculator: Resting Energy Requirement for Your Dog

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Dog RER Calculator

Calculate your dog’s Resting Energy Requirement

Dog Weight (lbs)

Life Stage (MER Factor)

Dog RER Calculator: The Foundation of Canine Nutrition

RER (Resting Energy Requirement) is the number of calories a dog needs at complete rest. It is the foundational number used by veterinary nutritionists for all feeding calculations. The formula: RER = 70 × (body weight in kg)⁰⋅⁷⁵. To get your dog’s actual daily calorie target (MER), multiply RER by a life stage factor.

RER Reference by Dog Weight

Weight RER (kcal) MER Adult Neutered
10 lbs (4.5 kg) 234 234 kcal
25 lbs (11.3 kg) 468 468 kcal
50 lbs (22.7 kg) 787 787 kcal
75 lbs (34 kg) 1055 1055 kcal

FAQs

How is dog RER different from MER?

RER is the baseline caloric need at complete rest. MER (Maintenance Energy Requirement) adjusts RER for your dog’s actual lifestyle and life stage. For most adult neutered dogs, MER equals RER (factor 1.0). Puppies, working dogs, and nursing mothers have MER factors of 2.0-3.0+.

Why does my vet use RER instead of bag feeding guides?

Bag guides are generalized and often over-estimate portions. RER is calculated for your dog’s specific body weight using validated veterinary nutritional science, making it significantly more accurate. Vets and veterinary nutritionists always start with RER for feeding recommendations.

Conclusion

Our dog RER calculator gives you both the base RER and the life stage-adjusted MER. For complete nutrition planning, use our dog food calculator and our calorie calculator.

Dog Lifespan Calculator: Life Expectancy by Breed Size

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Dog Lifespan Calculator

Estimate your dog’s life expectancy by breed size

Current Age (years)

Breed Size

Dog Lifespan by Breed Size

One of the most well-established facts in veterinary science is the inverse relationship between dog size and lifespan. Small breeds routinely live 14-16 years; giant breeds often reach only 7-9. Our dog lifespan calculator gives you an estimated life expectancy range and years remaining based on your dog’s current age and breed size.

Life Expectancy by Breed Size

Size Life Expectancy Examples
Small 12-16 years Chihuahua, Shih Tzu, Maltese
Medium 10-13 years Beagle, Border Collie, Cocker Spaniel
Large 8-12 years Labrador, German Shepherd, Husky
Giant 6-10 years Great Dane, Saint Bernard, Mastiff

FAQs

What is the longest-living dog breed?

Small breeds consistently outlive large ones. The Chihuahua, Dachshund, and Shih Tzu regularly reach 15-17 years. The world’s oldest verified dog on record lived to 29 years (Bobi, a Portuguese dog, certified in 2023). Among named breeds, Bluey the Australian Cattle Dog lived to 29 years and 5 months.

How can I extend my dog’s lifespan?

The five biggest factors: maintaining lean body weight (obesity reduces lifespan by 2+ years), regular veterinary care, dental hygiene (dental disease affects heart and kidney health), quality nutrition, and daily exercise appropriate for age and breed.

Conclusion

Our dog lifespan calculator gives you a personalised life expectancy estimate. For life stage nutrition, use our food calculator. To monitor your dog’s health trajectory, use our age calculator and weight calculator.

Dog Crate Size Calculator: Find the Perfect Crate for Your Dog

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Dog Crate Size Calculator

Find the right crate size for your dog

Dog Length (nose to tail base, inches)

Dog Height (floor to top of head, inches)

Dog Crate Size Guide: Getting It Right

The correct crate size allows your dog to stand up without crouching, turn around comfortably, and lie fully stretched out. Too big and it loses its den-like comfort; too small and it becomes a welfare concern. Our dog crate size calculator applies the standard +4-inch rule to your dog’s actual measurements.

Standard Crate Sizes by Dog Weight

Crate Size Dog Weight Example Breeds
18-22 inch Under 10 lbs Chihuahua, Maltese
24-30 inch 10-25 lbs Shih Tzu, Pug, Corgi
30-36 inch 25-50 lbs Beagle, Cocker Spaniel
36-42 inch 50-90 lbs Lab, Golden Retriever, Husky
48-54 inch 90-120 lbs Great Dane, Saint Bernard

FAQs

Should I get a bigger crate so my dog has more space?

Not necessarily. Crates that are too large lose their den quality and can encourage a puppy to potty in one corner and sleep in another. For a puppy, buy the adult size crate and use a divider panel to reduce the space. For adult dogs, comfort-size (length + 4 inches) is ideal.

What type of crate is best?

Wire crates offer the best ventilation and visibility. Plastic crates provide a more den-like environment and are airline-approved. Soft-sided crates are lightweight for travel but not suitable for escape artists. The right type depends on your dog’s temperament and your use case.

Conclusion

Our dog crate size calculator gives you the exact crate dimensions for your dog. For complete care planning, use our dog age calculator and our food calculator.

Dog Age Calculator Months: Convert Puppy Age to Human Years

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Dog Age Calculator Months

Convert your dog’s age in months to human years

Dog Age (months)

Breed Size

Dog Age in Months: Why It Matters for Puppies

For puppies under 12 months, thinking in months is essential because the developmental milestones happen rapidly. A 3-month-old puppy is at a completely different life stage than a 6-month-old or a 9-month-old. Our dog age calculator in months gives you human-year conversions for any age from newborn to senior.

Puppy Development Milestones by Month

Age Human Equiv. Key Milestone
2 months ~2.5 years Ready for first home; socialisation window
3 months ~3.75 years Core vaccines; primary socialisation
6 months ~7.5 years Spay/neuter consideration; adolescence
12 months ~15 years Adult (small/medium); still maturing (large)

FAQs

How old is a 6-month puppy in human years?

A 6-month-old puppy (0.5 years) is approximately 7.5 human years old — a young child. This is the adolescent phase: high energy, pushing boundaries, and testing limits. Training consistency is essential at this stage.

When does a puppy become an adult?

Small breeds: 10-12 months. Medium breeds: 12 months. Large breeds: 18 months. Giant breeds: 24 months. Mentally, most dogs aren’t fully mature until 2-3 years regardless of physical size.

Conclusion

Our dog age calculator in months gives you precise human-year conversions for any age. For life stage care, use our dog food calculator to ensure age-appropriate nutrition at every milestone.

Dog Food Calculator by Weight: Exact Daily Portions

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Dog Food Calculator by Weight

Find your dog’s daily food portion based on exact body weight

Dog Weight (lbs)

Life Stage

Food kcal/cup (check label)

Dog Food Calculator by Weight: The Most Accurate Method

Calculating your dog’s food by exact body weight using the veterinary RER formula is the gold standard for portion accuracy. Unlike generic feeding guides on food bags, this method accounts for your dog’s actual current weight and metabolic rate.

Food Amounts by Dog Weight (Adult Neutered)

Weight kcal/day @ 380 kcal/cup @ 300 kcal/cup
10 lbs 295 0.78 cups 0.98 cups
25 lbs 585 1.54 cups 1.95 cups
50 lbs 985 2.59 cups 3.28 cups
75 lbs 1320 3.47 cups 4.40 cups
100 lbs 1605 4.22 cups 5.35 cups

FAQs

Why should I calculate food by weight rather than using the bag guide?

Bag feeding guides are often over-generous (manufacturers benefit from you buying more food) and use broad weight ranges that can be off by 20-30%. A weight-based calculation using the RER formula is far more precise and accounts for your dog’s specific size and life stage.

Should I use my dog’s ideal weight or current weight for the calculation?

For overweight dogs: use the target (ideal) weight, not the current weight. This automatically creates a caloric deficit for safe weight loss. For underweight dogs: use the current weight and increase portions. For healthy-weight dogs: current weight is fine.

Conclusion

Our dog food calculator by weight gives you a precise daily portion for your dog’s exact body weight. Combine with our weight tracker for monthly health monitoring and our weight loss calculator if needed.

Dog Onion Toxicity Calculator: Emergency Guide for Allium Ingestion

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Dog Onion Toxicity Calculator

Assess the risk if your dog ate onion, garlic, or chives

⚠️ EMERGENCY: Onions, garlic, leeks, and chives are toxic to dogs. Call your vet or Pet Poison Helpline (1-855-764-7661) immediately if your dog has eaten any amount.

Dog Weight (lbs)

What Was Eaten?

Amount Eaten (grams)

Why Are Onions Toxic to Dogs?

Onions, garlic, leeks, and chives belong to the Allium family and contain thiosulfates — compounds that damage dogs’ red blood cells, leading to hemolytic anemia. Unlike humans, dogs cannot adequately metabolize these compounds. All forms are toxic: raw, cooked, dried, and powdered. Garlic powder is approximately 5-8x more concentrated than raw garlic.

Allium Toxicity Reference

Food Relative Toxicity Toxic Dose
Raw onion Baseline (1x) >5-10 g/kg = high risk
Garlic (raw) 5x more toxic >1-2 g/kg = high risk
Onion powder 5x more concentrated Even small amounts = risk
Garlic powder 25x more concentrated Fractions of a gram = risk

FAQs

Can dogs eat food cooked with onions?

No — cooking does not destroy the thiosulfates. Onion soup, onion rings, and any food cooked with onion or garlic is still toxic to dogs. Even small amounts consumed regularly can cause cumulative toxicity.

What are the symptoms of onion poisoning in dogs?

Symptoms may be delayed 1-5 days: lethargy, weakness, pale or yellowish gums, reduced appetite, elevated heart rate, collapse. These are signs of hemolytic anemia. Any suspected onion ingestion warrants immediate vet contact before symptoms appear.

Conclusion

If your dog ate onion or garlic, call your vet immediately — do not wait for symptoms. For routine dog health, use our calorie calculator and food calculator.

Dog Toxicity Calculator: Risk Assessment for Common Dog Poisons

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Dog Toxicity Calculator

Assess toxicity risk from common household substances

⚠️ If your dog ingested a potentially toxic substance, call your vet or ASPCA Poison Control (1-888-426-4435) or Pet Poison Helpline (1-855-764-7661) IMMEDIATELY.

Dog Weight (lbs)

Substance Ingested

Common Dog Toxins: Quick Reference

Dogs are naturally curious and will eat almost anything. Knowing which household substances are toxic — and how dangerous — can save your dog’s life. Our dog toxicity calculator provides immediate risk assessment and emergency guidance for the most common toxin exposures.

Top 10 Dog Toxins (ASPCA Annual Report)

Rank Toxin Emergency?
1 OTC medications Yes
2 Human foods (xylitol, grapes) Yes
3 Prescription medications Yes
4 Chocolate Yes (dark/baking)
5 Household plants Varies

FAQs

What should I do if my dog ate something toxic?

Do not wait for symptoms. Call your vet or Pet Poison Helpline (1-855-764-7661) or ASPCA Poison Control (1-888-426-4435) immediately. Have ready: your dog’s weight, the exact substance, and how much was eaten. Do not induce vomiting without professional guidance — for some toxins, this makes things worse.

Is it safe to induce vomiting in dogs?

Only under vet guidance. For recent ingestion (<2 hours), vets may advise inducing vomiting with hydrogen peroxide (3%). Do NOT induce vomiting for corrosives, petroleum products, or sharp objects. Always call a professional first.

Conclusion

Our dog toxicity calculator is a first-response reference — always follow up with a vet or poison helpline call. For routine health, use our calorie calculator and food calculator.

Chocolate Dog Calculator: Is Your Dog’s Chocolate Dose Dangerous?

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Chocolate Dog Calculator

Check if the chocolate your dog ate is dangerous

⚠️ If your dog ate chocolate, call your vet or Pet Poison Helpline (1-855-764-7661) IMMEDIATELY. Do not wait for symptoms — early treatment is critical.

Dog Weight (lbs)

Chocolate Type

Amount Eaten (oz)

Why Is Chocolate Toxic to Dogs?

Chocolate contains theobromine (and caffeine), both of which dogs metabolize far more slowly than humans. Theobromine accumulates to toxic levels, causing vomiting, diarrhea, seizures, heart arrhythmia, and death. Darker chocolate has more theobromine — baking chocolate is the most dangerous.

Chocolate Theobromine Reference

Type Theobromine/oz Risk Level
White chocolate ~0.25 mg/oz Very low (fat/sugar risk)
Milk chocolate ~64 mg/oz Moderate
Dark chocolate ~393 mg/oz High
Baking chocolate ~450 mg/oz Very high

FAQs

How much chocolate is dangerous for a dog?

As a guideline: mild symptoms start at ~20 mg/kg theobromine; severe symptoms at 40-60 mg/kg; fatalities reported at 100+ mg/kg. For a 20 lb dog, just 1 oz of baking chocolate (~450 mg theobromine / 50 mg/kg) is a severe emergency.

Will my dog be okay after eating a little chocolate?

Maybe, but you should always call your vet. Some dogs are more sensitive than others. Early treatment (inducing vomiting within 2 hours, activated charcoal) is far more effective than waiting for symptoms.

Conclusion

If your dog ate chocolate, use our chocolate dog calculator for a quick risk assessment — then call your vet immediately regardless. For routine dog care, use our calorie calculator and age calculator.

Dog Protein Calculator: Daily Protein Requirements by Weight

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Dog Protein Calculator

Calculate your dog’s daily protein requirement

Dog Weight (lbs)

Life Stage & Activity

How Much Protein Does a Dog Need?

Protein is the most critical macronutrient in a dog’s diet, providing essential amino acids for muscle maintenance, immune function, coat health, and enzyme production. The AAFCO minimum for adult dogs is 18% DM (dry matter basis), but optimal intake is significantly higher — especially for active dogs and puppies.

Protein Requirements by Life Stage

Life Stage g protein/kg BW AAFCO DM %
Adult (sedentary) 2.0-2.5 g/kg 18% minimum
Active adult 3.0-4.0 g/kg 25-30%
Puppy 5.0-6.0 g/kg 22.5% minimum
Senior 2.0-3.0 g/kg 18-25%

FAQs

Can a dog have too much protein?

In healthy dogs, excess protein is simply excreted via urine — it does not cause kidney damage in dogs with normal kidney function. Dogs with pre-existing kidney disease should follow vet-prescribed protein restrictions. High-protein diets can contribute to weight gain if total calories exceed needs.

What are the best protein sources for dogs?

Chicken, beef, turkey, lamb, salmon, and eggs are all excellent high-biological-value protein sources. Plant proteins (legumes, grains) are lower in biological value but can complement animal proteins in balanced commercial diets.

Conclusion

Our dog protein calculator gives you a daily gram target based on weight and life stage. For complete nutrition planning, use our dog nutrition calculator and our dog food calculator.

Dog Pregnancy Calculator Week by Week: Complete Milestone Guide

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Dog Pregnancy Calculator Week by Week

Track your dog’s pregnancy week by week

Mating / Conception Date

Dog Pregnancy: A Complete Week-by-Week Guide

Dog gestation lasts approximately 63 days (9 weeks) from conception. Each week brings significant developmental milestones for the puppies and physical changes for the mother. Our dog pregnancy calculator week by week gives you a personalised timeline from your mating date.

Key Pregnancy Milestones

Week Key Milestone Care Action
Week 4 Ultrasound confirms pregnancy Vet check, confirm puppy count
Week 5 Visible weight gain Increase food 25%, switch to puppy formula
Week 7 X-ray counts puppies Set up whelping box
Week 9 Birth imminent Monitor temperature, have supplies ready

FAQs

What does a dog look like at 4 weeks pregnant?

At 4 weeks, your dog’s abdomen will be slightly enlarged and firm. Nipples become more prominent and pink. Some dogs develop a clear mucus discharge. An ultrasound at this stage can confirm pregnancy and detect foetal heartbeats.

How many puppies can a dog have?

Litter sizes range from 1 to 12+ puppies depending on breed size. Small breeds typically have 1-4 puppies; large breeds 6-10+. A veterinary X-ray at week 7 is the most accurate way to count expected puppies before birth.

Conclusion

Our dog pregnancy calculator week by week gives you a complete personalised timeline. For post-whelping nutrition, use our dog food calculator to plan the mother’s increased calorie needs during nursing.