Obesity is a common problem in many reptiles and amphibians kept in captivity. Many species are overfed because of owners ignorance of natural feeding intervals and of food types commonly eaten in the wild.oods: Vitamin A is found in dark green and yellow vegetables and yellow fruits, such as broccoli spinach, turnip greens, carrots, squash, sweet potatoes, pumpkin, cantaloupe, and apricots, and for non-herbivorous species vitamin A can be obtained from animal sources such as liver and whole eggs.