Cat Suddenly Weak Hind Legs. I read some articles that said if she's in obvious pain it could be a blood clot, but other than being a little lethargic and withdrawn, she seems fine. Gently massage the upper thighs of the rear legs.
Our cats then lose the ability to walk normally on those legs. Very interesting db since potassium depletion is normally associated with kidney disease amongst others though i guess if sam was weeing alot then this would also be. Usually, the back legs of a cat with kidney disease buckle unexpectedly or appear wobbly.