My dad is 84 with Alzheimer's and seems to have deteriorated markedly in the last couple of weeks. He's suddenly lost appetite and keeps standing semi bent over and kind of 'puffing'. He lives alone with a daily care visit. I took him to the go last week thinking he may have a urine infection but it was all clear and no other physical problems were evident. Is this hanging over position common, and the puffing? He also seems to have developed a fixation that drinking anything will make him pee and I am worried he's getting dehydrated . I am sure today he didn't know who I was. This is a quite sudden drop in his condition - is this common?