Cats are obligate carnivores, which means their bodies are built to run on animal protein and they cannot thrive on a plant-based diet the way some animals can. Understanding this shapes every good decision about what goes in the bowl.
What that means in practice
Cats require certain nutrients that come only, or most reliably, from animal tissue — including the amino acid taurine, which is essential for heart and eye health, and pre-formed vitamin A. A deficiency in taurine, for example, can cause heart disease and blindness. This is why cats must never be fed dog food or a homemade diet without expert formulation.
Choosing the right food
- Pick a complete and balanced cat food with a named animal protein high on the ingredient list.
- Avoid foods padded out with large amounts of plant filler.
- Never substitute dog food, which lacks the taurine and protein levels cats need.
- Be cautious with vegetarian or homemade diets unless formulated by a veterinary nutritionist.
The bottom line
A cat's biology is non-negotiable: it needs meat-based nutrition to stay healthy. Choosing a quality, species-appropriate diet is one of the simplest and most important things you can do for a long, healthy feline life. When in doubt about a special diet, consult your vet.
