So I just picked up a little male calico that has not eaten yet. He was hatched on 9/1/11 and weighed 64 g. He had his 1st shed on 9/16/11. I weighed him today on 9/29/11 and he weighs 63 g. He still looks pretty good. I picked up a picky press just in case because I'm just not gonna let my little calico perish because he is stuborn. I've tried pinkie mice, rats, gerbils, and fuzzies. So when do I become concerned and use the pump? I understand there is some debate on whether or not to use pumps but I dont really care. I would rather he eat on his own but if worse comes to worse when do I assist feed? thanks for any advice.