Hi Andres, I recently got a bumblebee that does the same thing. As long as he is eating well then you can start to work with him. Buy some thick leather gloves if you're afraid of getting bit. Then handle him for about 15 min twice a day to get him to get used to handling. It's starting to work on mine, now he just huffs and puffs but doesn't bite. Just remember to get him settled in and eating before you do this.