Hi, I've noticed that my Luna likes my other cat's (Han) food. He is still eating his kitten food. I look at the ingredients and they are very similar. Protein & fiber are the same the only difference is the fat by 2%. I feed them both simply nourish
It all depends on what the AAFCO statement says. You will have to check if the food has met AAFCO standards for feeding kittens, adult cats, or all life stages. The crude protein, fiber, etc. is not very helpful in determining if the food meets the nutritional demand of the life stage. Below is a link to an article that explains this a bit further and will tell you where to find the AAFCO statement.
https://www.petcoach.co/article/what-to-look-for-when-choosing-your-pet-s-food/
If the food is deemed nutritionally adequate, then it's OK to feed them each other's food, but keep in mind the recommended amount to feed (should also be somewhere on the bag). The biggest concern with feeding an "all life stage" food is that it gives them too much calories, which can lead to obesity. If you notice that your cats starting to get chunky, then it's important to start reducing the amount of food they get.
I hope that helps and all is well with the kitties.
Updated on September 24th, 2025