bdat40oz

Hes just a big old lab mix 120lbs (thats his healthy weight) He about 7 now and of course hes getting old but he bit me for the first time ever. I mean this dog is or was the most mildest temper ever. He wouldnt hurt a fly (Now?) I would have trusted and have trusted new born babies and kids around him. Its never been a issue but I went to drag him in for a bath and he bit me hard (I mean visous) I am just freaked by this. He is well trained and has been the best dog ever, never ever biting anyone or anything. He has never even showed signs of any aggression ever!!!!!! Interestingly enough my wife and I are trying to concieve or may have already. Either hes picking up on this somehow (we havnt bought a single thing yet or made any household changes) yet..none) or maybe hes just in alot of pain all the sudden hes a big old lug. Just loving I ant believe it. Maybe he knows his mom is prego or somehow he senses something. Any explanation for this even possibly early signs if heart failuWow!!!!! great answers so far I am not used to that. Thanks everyone!