I have a litter of 4 Netherland babies that are now 3 days old. Initially they were all the same size but now 1 is large, 2 medium and 1 small. The small one never has a plump belly like the other 3, and doesn't seem to be able to use his back legs. He doesn't have the bulgey eyes, or the small ears set far back on his head that are typical of peanuts though. I've pulled the mama out a few times and let him nurse and he latches well and seems to be getting milk (he had a cute little milk moustache! LOL) but his belly never looks full. Are there any other signs to look for to be sure he's a peanut or not? Thanks in advance for any info.