Rani my australian shepherd mix has beeb loosing her temper lately with the other dogs but mostly it has just been growling at them when she doesnt want to be bothered. But a few minutes ago while i was petting her she bit me without any warning. She has never done anything like that before. I sent my vet an email to call me but if I tell her that she bit me will she have to report the bite? I'm in Michigan if anyone knows the laws for here. I think Rani is about 9 yrs old I'm wodering if she could be developing csnine disfuction or what ever it is called. Kind of like alzheimers for dogs.