Captive breeding and rearing giant tortoises still represents a challenge and little scientific evidence is available on the requirements of juvenile and adult giant tortoises. Zoo veterinarians must know that developmental diseases are the main risk in the raising process. Respiratory tract disease, endoparasites and biting are other pathologic conditions that have been observed in juvenile giant tortoises. The fast growth observed in giant tortoises must controlled by limiting the amount of food and reducing digestibility. Giant tortoises are well adapted to a high fiber, herbivore diet. Special attention must be given to the mineral supplementation and photoenvironment.