So I bought my pastel about 3 weeks ago and he hasn't eaten yet. He's 1130 grams so he definetly has eaten before. Since I have had him he has not eaten yet. If tried all sizes of rats, small, medium, and large but he hasn't even tried. He will look like he's going to eat by getting in strike position and following but than backing off. Should I be worried?? The owners said he eats live rats they even had a big tank of live rats at there house.