Ok so long story short my sister had a 8 yr old male bp. I noticed he wasn't being taken care of properly so I offered to take him. So I've had him for 2.5 months now. He had no heat source just newspaper water and a hide. Hadn't been handled in probably a year. Surprisingly he's not aggressive and after a few times of handling him he does not ball up as soon as you touch him anymore. She had been feeding him every 2 weeks a small f/t rat. But once he got to my house he didn't eat for 6 weeks. And the only way I got him to eat is offer adult mice. I know there not big enough for him but he refuses to eat rats now. He eats 1 every 4 days. When I weighed him he only weighs 177 grams. Which is extremely under weight,right? This is my first snake he's so sweet and I just want to get him nice and healthy again since he was neglected for a long time. Any help would be greatly appreciated.