Hi Brigitte, just wanted to mention that if Molly is a cat, that weak back legs might be a sign of diabetes.
Thanks, Blur. Yes, she's a cat. It's her kidneys that are failing, which also causes muscle wasting. They've been that way since her last BW, which showed no signs of diabetes, but did reveal decreased renal function at 60%. Her quality of life is still excellent; she eats and drinks fairly normally, is clean with her litterbox, and she is very interactive/affectionate. So far, so good, but I know it's just a matter of time at this point.