Most don’t but the Tibetan Mastiff is very long lived. Many live to be 14-15 which is really long for such a huge dog.
Did know that. The most difficult thing about having one of the larger dogs and letting go. May have think about that one for a while.
OTOH my Border Collies seem to fit well with our lifestyle...Newest is just six months old. So smart. She already know sit, jump, to the porch, shake paw, lay down.
Right now she is teething poor baby.