I have a male panther cham who is about 2 years old. He is in an enclosure that is screened at the top and two sides, but the front and back are glass. The back has an aquarium type picture up showing plants, etc. There are 2 lightbulbs at the top, one is an Exo-Terra 120 Volt sun glo, and the other is a 20 watt zilla desert 50 bulb. At the bottom of his cage we use repti bark 100% pure fir bark. I mist his cage several times a day, and feed him crickets dusted with Repti calcium or Flukers calcium. His enclosure is lit from 6 am until 8 pm. Tempurature is 80 degrees with 25% humidity. The problem is today I noticed he was hanging from a branch, only holding on by his front legs. His back legs were just hanging. I took him out and held him, and usually he is very active and crawls right up my arm to my head, but today he is moving very slowly. I put him back in his home and I have been watching him closely, he doesn't have strength in his back legs. He won't hold on to anything with his back legs. What could be the problem? I found a bowel movement which is within a day, but he doesn't seem to want to drink at this time. He is just hanging around the bottom of his cage. Any ideas?