The Selection of Iguana: When you buy infant iguanas to make your pet, you should buy the healthy reptiles, which are energetic and lively. The healthy iguana is round in shape and its eyes are also round and shining. The skin of iguana should be free from scratches, lumps, scars and cuts. At the same time, observe that the animal you buy is clean and no fecal matter is clinging to it. Further, they are very small in comparison to other varieties of iguanas and can grow only from 5 inches to 35 inches in length. They have big scales on their tails, which is their most spectacular feature. They are omnivores and feed on fruits, flowers and small insects as well. Genus Dipsosaurus iguana is the dessert iguana from Southern America and Mexico. Sometimes they eat insects, animal food, land crabs and carrions. Small animals and insects are pet food for young Rhinoceros Iguanas. The bush or the plant that they select for their food is precious to them. They will guard it from the other species of iguanas. They spend their lot of time in eating or lying in the sun to get heat. The predominant signs are loss of weight and appetite, bloating and even death. Bladder stones: There abdomen gets swelled due to formation of stone in bladder. Egg-binding: The female iguanas die due to this problem particularly when they cannot pass the eggs through their reproductive tracts. In addition to the above common sicknesses, there are a few more common ailments, which should be immediately attended to save the life of pet iguanas. In cold climate, iguana continuously needs warmth to survive and digest its food. You have to maintain the temperature in their enclosures. They need constant warmth for their body as they are cold blooded creature. You will have to install lamps or heaters to keep them warm in cold areas. Pet and Tamed iguana. In case you want to keep iguanas as pet, you should note a few important points as dos and don'ts with them. The enclosure of your pet iguana should be cleaned regularly. It should be big enough to accommodate the pets for moving freely and feel comfortable in it. There should be sufficient lighting.