Created specifically to help 7+ pets fight the effects of aging.

pets age
much faster
than people

Because dogs and cats age more quickly than people do, major health changes can occur much earlier in their lives. Pets can be considered “middle age” when they turn 7 and “retirement age” at 11, and often develop many of the same age-related issues seen in older people.

Use this slider to find your pet’s “real” age.

year s
Age 1: Your pet is the equivalent of a human teenager
Age 2-6: For every calendar year, your pet ages about 4 human years
Age 7+: Age-related changes in your pet’s behavior may become more noticeable
your cat is
in human years
your dog is
in human years

aging happens
from the inside out

At Hill’s, we’ve been studying how nutrition impacts pets’ cell function for over a decade. We learned the aging process is complex, slowing pets down both mentally and physically.

Pets’ Gene Activity Changes at 7 Years Old

Each column in these maps represents a different pet, and each row represents a specific gene to give us a full picture of how their cells change over time.

Cat gen map 2-6 years Cat gen map 2-6 years


Cat gen map 7-10 years Cat gen map 7-10 years

7-10 YEARS

Cat gen map 11-14 years Cat gen map 11-14 years

11-14 YEARS

Dog gen map 2-6 years Dog gen map 2-6 years


Dog gen map 7-14 years Dog gen map 7-14 years

7-14 YEARS

  • Decreased expression of genes
  • Increased expression of genes

Compared to younger dogs and cats, older pets have different gene expression. This can affect how their bodies function, because some of those genes are associated with inflammatory processes, oxidative stress, immunity, DNA repair, energy production and protein metabolism.

Through our research we were able to identify these changes and develop Hill’s® Science Diet® Youthful Vitality.

Your Pet’s Food Can
make a difference

Bags of Hill's Science Diet Youthful Vitality cat & dog food, specially formulated for your senior pet.

Hill’s® Science Diet® Youthful Vitality was developed with the changing biology of your 7+ pet in mind. This breakthrough nutrition is made with our proprietary recipe of natural ingredients including fruits, vegetables, fatty acids and antioxidants plus added vitamins, minerals and amino acids — all working together to fight the effects of aging.

See the benefits:


As your pet ages, they may begin to show some of these outward signs. But because these age-related changes can creep up slowly, just like they do with people, you might not realize it at first.

Have you noticed any of these signs of aging?

If so, it might be time to change your pet’s food or talk to your vet.

Keep your 7+ pet in the game. Shop Now

Shop background