So, I got my mexican red rump tarantula about 2 years back. He is not the type to like always keep moving around much. He has ate well and grow up. But recently since last month, he had stopped eating. Wouldn't move around much. I changed his enclosure to a larger one for him and he wouldn't even walk around on the substrate. Nothing worked. He only seem to be drinking water. His abdomen shrunk due to not eating and I took him to the guy I bought him from and he bit the guy as well. I've never seen him be aggressive or bite someone at all before. Or even show signs of him trying to bite or anything. And he fed my T a super worm and he finally ate after almost a month and a half. Fed him again after a day and he only ate half the worm. But he seems to be curling his legs and still wouldn't move. I don't know what to do.