Bernice:  He was blind too.  And if you didn't watch him, he'd walk right off the edge of the deck.  But he's was a fat boy and he'd just bounce and keep going.    He eventually had to be put down.  Very sick.  Another of our dogs went in for a checkup and was found to have cancer.  He was put down that day.  Both dogs were about 15 years old so I guess that's good.  The last one we have has been dead for over a year but she's doesn't know it yet.  So we keep feeding her and stuff til she figures it out.