
It's recommended to feed your cat pet-specific goat milk powder, as it's more nutritionally complete and its ingredients are safer for cats. Also, kittens over 2 months old no longer need milk. Your kitten is 3 months old, so you can feed it kitten food. If your kitten has dental problems or digestive issues, you can soak the kitten food in warm water or goat milk to soften it before feeding it to your kitten.
Once your kitten is over 6 months old, you can start feeding it other supplementary foods to enhance its nutrition, such as minced chicken breast, beef, or fish. You can also buy cat treats, canned cat food, or raw meat and bones. However, be careful not to feed it too many different kinds of food at once, ideally only 1-2 different kinds, and don't feed it too frequently to avoid making it picky about food.