Freezer Lock Set

My little 9 week old kitten crawled into my side by side freezer without me noticing and was locked in for at least 8 hours! The next morning when i found him he was alive but his tail was frozen solid. I warmed him up with some warm towels and he seemed to be pretty much back to normal a couple hours later. However one of my friends said that the effects of hypothermia can take days to set in. This happened yesterday. Should I be worried about anything?? What should I look out for?
ok, as soon as i get off work at noon i am taking him in to the vets! My poor little baby, that must have been so awful!
you shouldn't be calling someone blondE if you don't even know how to spell it yourself! And yes I didn't notice he was gone because i went to bed right after he climbed in the freezer, my husband does not allow animals on the bed so he doesn't sleep with me. So not noticing he was missing isn't very hard to believe.