Hello all - I've recently (as in today) come into two ferrets, a male (Mishka) and a female (Laska). While Laska is all about play and exploring and being a goober, Mishka is... asleep. Like hardcore asleep. I pick him up, and he might stretch or yawn, but he's staying asleep. He's still breathing (we had to check at one point), and he's played a little, but he just seems to be a serious sleeper.

So... How normal is that?