Some of the problems overweight pets can have include diabetes, gastrointestinal discomfort, liver problems, kidney malfunction, skin and hair problems, joint disease, heat intolerance, reproductive disorders, and difficulty breathing. Overweight pets are also at a greater risk for cancer, and they are at risk of more complications from anesthesia than healthy pets. Overall, overweight pets are more likely to have a decreased lifespan and quality of life.

The problem of overweight pets is largely caused by well meaning pet owners who do not understand how to feed their animals. The pet food industry has also promoted specific points of view about feeding which are not necessarily healthy for animals. As a general rule, table scraps and treats should be eliminated from the diet altogether for both healthy and overweight pets. A veterinarian can make specific recommendations for individual pets, as well as answering other medical questions which pet owners may have.