There are many ways to prevent pet obesity, but the most common way to prevent your pet from becoming obese is by managing their caloric intake. When it comes to pet obesity, many people overestimate the effects of exercise. While it’s healthy for your pet to exercise, managing your pet’s diet is the main way to prevent obesity. You can help to manage your pet’s diet by having them follow a strict plan and making sure they’re not consuming too many treats or human foods.