Hey man you're t-rex looks great! Love to see a wire of him. Is it possible if he were sleeping that he'd lie on his side? This is how a dog sleeps and would look much more natural, but as kurt said, his current position would make it much easier to get him up. If you plan on keeping in his current position (or a similar one) you might want to take a look at a sleeping horse, for they also sleep like that.