From Puppies to Senior Pets: How the Right Food Can Keep Your Pet Healthy

What your pet eats matters more than most people think. A veterinarian named Cat Henstridge, also known as "Cat the Vet," says that the right food can help pets stay healthy at every stage of their lives. Just like humans, pets have different nutritional needs depending on how old they are. Understanding those needs — and acting on them early — can make a big difference for your animal's health and happiness.

Henstridge says nutrition is one of the most important tools a pet owner has. Good food can keep a pet's brain, joints, and gut in good shape, and it can even be part of a care plan when a pet is sick. The great thing, she adds, is that pet owners are in charge of what their animals eat. "We have the control to ensure that what goes in their mouth is really going to nourish them and help them thrive."

Not every pet needs the same food. An active dog may need something different from a calm indoor cat, and some pets have sensitive stomachs or skin. Finding the right diet can take some experimenting, but starting with food from trusted, science-based companies is a smart first step. That way, even while you figure out the best fit, you are starting from a solid foundation.

Baby animals like puppies and kittens grow very fast, so they need special nutrition. Their brains are developing quickly, and they are learning new things every day. Foods that contain EPA and DHA — two types of omega-3 fatty acids found in fish — help support healthy brain growth during this early stage of life.

Young animals also need help building strong immune systems. When puppies and kittens are first born, they drink their mother's milk, which contains something called colostrum — a substance packed with antibodies that help protect the baby animal from illness. Over time, the baby's own immune system needs to take over, and high-quality pet food can help support that process.

As pets grow older, their food should change too. For most cats and small dog breeds like chihuahuas, the switch to adult food usually happens around one year of age, while larger breeds like Labradors may not be ready until around 18 months. The exact timing depends on each animal's size, weight, and how fast it is growing.

Adult pet food backed by science often includes omega-3 oils for brain and joint health, plus fiber to keep the gut working well. Owners can try different protein sources — like chicken or salmon — to see what gives their pet the most energy, the best coat, and healthy digestion. "It fuels their health, and if you have a pet who is healthy, nourished and physically fit, then they are going to be better able to cope with whatever life throws at them," says Henstridge.

Many pet owners wait until they can see signs of aging before changing their pet's diet, but Henstridge says that is often too late. "We want proactive healthy ageing and we can use nutrition to help do that — because when we finally start to see signs of ageing in our pets, it's already been happening for a long time." Acting early gives pets a better chance of staying healthy longer.

Cats begin to change inside their bodies around age seven, even if they still look and act young. Dogs age differently depending on their size — smaller breeds age more slowly, while larger breeds age faster. In general, a pet is considered "senior" during the last third of its expected life, and that is a good time to switch to a diet made for older animals.

Special fats and oils found in senior pet food can help slow brain aging and support cognitive function. Small, consistent choices made each day can add up to a much healthier life for your pet over time. As Henstridge puts it, "Nutrition can do an enormous amount of the supportive work for that."