I got my first redtail back in sept. and ive been really having problems with him since, the lady i got him from said he was eating well and was just a little older than 3 months, well turns out i bought a snake that had probably only eatin one meal, after i got him home he would only eat every two weeks, after two months he decided to eat once a week, well its now been three weeks since he ate and seems to be loosing a little weight, also his mouth sits open a little and i though he may have an infection but his tank stays around 90 on the warm side and 80 on the cool, also he is still well "pooping" but the past couple days its been like a bright yellow creamy substance seems different to me what do you all think the problem is here