I JUST RESCUED A LARGE 3YR CAT APPROX 15LBS, SHE HAS BEEN IN A SMALL CAGE APPROX 5MONTH, I GUESS SHE HAS BEEN LET OUT A LITTLE. SHE DOESNT WALK VERY WELL AND HAS KNOTS ON THE BACK OF HER LEGS(LIKE MUSLE KNOTS) WILL THEY WORK THEMSELVES OUT? THE VET DOENST SEEM TO CONCERNED? WE HAVE HAD HERE ABOUT 2 WEEKS.SHE WALKS A FEW STEPS AND THEN SITS.ANY SUGGESTIONS? I HAVE 4 CATS ALL OF THEM RESCUED FROM POUNDS AND SHELTERS BUT HAVE NEVER HAD THIS BEFORE.