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Dogs age faster than people. Size and breed influence the pace at which a dog ages. Smaller dogs live longer than larger dogs; they mature faster in the first years of life. Larger dogs grown-up more slowly at first but are considered mature at age five. Small and toy breeds become seniors at 8 years of age. Medium-sized breeds are somewhere in the middle in terms of maturation and lifespan.

Different breeds of dog age at varying speeds. Use the following tables as a guideline to find out your dog’s life stage according to his age.

Small and Toy Breeds

Life Stage Age
Puppy Weaning to 10 months old
Adult 10 months to 8 years old
Mature > 8 years old


Medium Breeds

Life Stage Age
Puppy Weaning to 12 months old
Adult 1 year to 7 years old
Mature > 7 years old


Large and Giant Breeds

Life Stage Age
Puppy Weaning to 15 – 24 months old
Adult > 15 -24 months of age – 5 years old
Mature > 5 years old


Toy and small dogs are known for their long life expectancy, which can extend to 14 to 16 years. Larger dogs have a much shorter life expectancy, which ranges from 9 to 12 years in large breeds and 7 – 9 years old in giant breeds. Medium Breed dogs have a life expectancy of 10 to 12 years.

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*Disclaimer: We are not vets nor animal nutritionists. Please consult with your own veterinarian when choosing and/or trying new foods.*