I got her into the vet today, he did a good hands on feel of her hips and legs[he's been there for years] and he's sure or pretty sure she has a Cruciated Ligament I guess this is quite a common problem in large boisterous pups. He asked if she ever slipped on the ice.....Oh ya!! She's crazy. I guess it sometimes can heal on it's own but might need surgery down the line. He gave me some pills to give her for two weeks and then take her back in, other than that she's has a good stance, nicely built, good weight at 70 lbs. Anyone here have a dog that has/had this problem??