My hamster had a litter of pups 4 weeks ago and we have separated the babies from the mom over a week ago, but started noticing weird behavior from one of the babies after a week of being in his own cage with the others. He will be sleeping in a corner of the cage and look like his dead and lip and my husband will take him out and pet his belly to see if he will wake up and he just lays there limp. And then after a minute or so he will roll over and act normal. He is breathing and everything but he is just limp when you pick him up. We have only had one more out of the 8 do this, the others wake right up if we touch them, is this normal?