I never know dogs also have this teething stages until my pup's tooth fell off and its mouth was covered with blood... it's really scared the hell out of me you know, as he's the first doggy we ever have and there's alot to learn too!!! Luckily my cousin's a vet and if anything happen, we still able to get his advices at once! hahaha~
My pup is about 5-6 months old now with new set of big white adult teeth! Oh my, i guess he's no longer a puppy, 'cos he's grown up soo big soo fast...erm...may be an adolescent now?
See how he lie when he wanna sleep... two legs straight back and the other two straightly front