Cagney is such a handsome man. I love seeing him. I'm nobody to give advice but I'm thinking maybe he's experiencing some arthritis issues. How old is he now? He sure doesn't look old but maybe some sort of aches and pains might be troubling him. A trip to the vet sounds like a good idea. Maybe the vet can shed some light. Please keep us posted on how he's doing and try not to worry too much if possible. I know that's easier said than done (((((HUGS))))) I'm only a PM away if you need to talk