Our puppers is 17 and seems to be declining rapidly. Physically he's in good shape but we believe he's got dementia. He did not recognize me yesterday and bit my hand hard -- I have never been in so much pain in my life (including my current broken foot). He almost bit Mrs. Zing too. Today we are having a certain conversation with our vet. He's my first dog I've owned. My heart is breaking. Right now he's doing his daily bathing of the gal at the end of the bar.