My older male cat is 14 this year. He always was extremely fat. About 3monthes ago he for some reason lost alot of wieght. During that time his appitite decreased and he started drinking lots of water and going to the bathroom alot. Recently, his appetite has gotten back to normal and he eats almost 2 full bowls of dry cat food a day (plus treats). However, he is still really skinny. He still searches for water, but he does not drink as much as he did when he originally got sick. He goes to the bathroom frequently and when he poops, it's really large, almost like all the food he ate is going right through him. He seems happy enough, and while he is more lathargic than he was before he lost all the weight, he's relatively bright and his coat is healthy. He'll jump up in your lap and pur, so he does not act like he is in pain. Is he just aging? I avoided taking him to the vet in the first place because it troubles him so, and if he's just getting old/fadding away i did not want to stress him. Any of your older cats ever go though this?