What happens if my cat eats dog food?

It’s usually not a bad thing if your dog eats cat food as long as it isn’t an every day occurrence. Dogs are garbage guts, and as long as they aren’t getting too many carbs in their diet (especially corn), they can generally adapt (within reason). The biggest danger for dogs eating cat food is that dogs might not be able to process the excess protein that is in cat food, and this might cause kidney and liver problems over the long term.

Conversely, cats should not ever eat dog food. Dog food tends to be very high in carbs, especially corn, and these are substances that a cats digestive system cannot properly process. Additionally, if a cat is *only* eating dog foot, there is a high likelihood that the cat (who is an obligate carnivore) is not getting enough taurine, which is an essential nutrient for cats.

Finally, one recommendation that I always make when it comes to my feline friends is that cats should not ever be exclusively fed a diet of kibble (even if it is cat food). The reason why is because cats have a very week thirst drive. Kibble is low in water, and cats need to get water from their diets in order to stay hydrated. Cats who eat exclusively kibble tend to have higher instances of kidney and urinary issues.

Source:Quora