For the last couple of months, I thought my elder kitty was just going senile. She turned 19 this summer and has the usual "old cat" look....frail back and hind legs, loss of muscle and weight and just looks "old". She also started tinkling and pooping outside her liter box and seemed obsessed with her water bowl (hovering over it for hours). She has hip dysplasia and "old cat back", which cortisone shots took care of 2-3 years ago, then they stopped working. I found Syn-Flex for pets online and she made a miraculous recovery. The vets did all kinds...