If an animal is lactose intolerant, that means its body may not produce enough enzymes that are responsible for digesting milk and dairy. In most cases, when a cat is given milk or other similar products in their diet, the cat may show signs of digestive issues such as an upset stomach, vomiting, diarrhea, flatulence, swelling of the tummy area, etc.
Take note that these conditions can be fatal so it is never advisable to feed your cat any type of food without making sure it is safe for your cat.
If you have any concerns about your pet's health and/or behavior, make an appointment with an animal hospital Wichita, KS.