I want to post this update.. It was the easiest thing to do to switch my 9 months old male Dumerils Boa from mice to rats. As his body grows, he required more food. And he has an amazing feeding response. I got to be careful in the future when i feed him. Actually i could tell from his body language if he is hungry or not. I feed him live. So After feeding him an XXl mouse before two days, he remained hungry. I wanted to feed him a small rat, around 5 or 6 weeks old. So when i opened the cage he knew that food is coming, and he struck the air first and waited for the food. So when i put the rat inside he struck it immediately and ate it.