A potbelly pig needs low-calorie foods that are high in fiber and low in protein. Fresh vegetables should make up 25 percent of the pig's diet. Consumption of starch-based vegetables, such as potatoes, should be minimal. Pigs need to graze in soil to get plenty of selenium and iron; mineral supplements are an alternative. Potbellies should receive one chewable multivitamin for children each day.
Quality vegetables for potbelly pigs include peppers, celery, cucumbers, greens and carrots. Apples, raisins and grapes are suitable foods during training, but fruits should be limited because the are high in sugar.
More fiber can be given to the pig through alfalfa hay, and some experts recommend a bran-based diet. Salty snacks and high-fat foods should be avoided. Potbellies should not consume cat or dog food due to the high amount if protein they contain.
Piglets up to 6 weeks old can be fed free choice of starter food. Free choice means being fed as much as they desire. Piglets can consume a commercial starter food until they are 3 months old, then they can be slowly transitioned to an adult diet. Non-breeding adults should receive 1/2 cup of maintenance food for every 25 pounds. Pigs 75 pounds or over should be fed 1 1/2 cup for every 25 pounds. Potbellies should be fed twice a day, but owners should reduce the amount of food if the animal develops rolls of body fat. Skinny pigs should be fed more.