Hi everyone: I am very curious. I have 2 ferrets and an 8 year old son. I wanted to ask you all if this happens to you. If my 8 year old wakes the ferrets out of a deep sleep, they shake, almost like they are viabrating. I am not sure if they are cold or if its nerves. Is this normal? I know that both ferrets respond to being woken up in the same way. Good health to all: Buffy [Posted in FML issue 1865]