Owners can overfeed their animals by as much as 25% a day, said Ernie Ward , a veterinarian and founder of the Association of Pet Obesity Prevention . "It seems so innocent. You overfeed and you don't even know it," he said.
However, Ward doesn't place the blame on petfood, but on treats, calling them "kibble crack" and "calorie grenades."
Marion Nestle, a professor and co-author of Feed Your Pet Right , agreed with Ward, saying the worst offense may be the "guilt treat" - those dropped by the handful when pets have to be left alone.