We are very excited to become a 1st time Veiled Cham owner. We have a 7 year old son that is extremely afraid of dogs, or anything that may bite him. Is it better to start with a baby or an adult? We have a chance to purchase a 2 year old female that's beautiful, her owner said she only hisses when taking her out of her cage. What age Cham is best to start with for a new owner w kids?