I've noticed something weird in the past two weeks with Walter, its only a handful of times. This is hard to describe so bear with me. He'll either get up or be walking and his right front paw will, roll inward? Does that make sense? His paw instead of landing flat on the pad in normal walking position it bends in and causes him to fall, rather hard to the carpet. Kind of like when we "roll" our ankles on accident. First I thought his toe nail were too long and catching on the carpet I trimmed them, but it happened again this time on concrete. His paw desn't seem to be causing pain, he'll let me play with it without a peep or jerk? He does act like his shoulder bothers him on the same leg, he'll let out a growl once in a while? I tried google and couldn't find anything that sounded like it fit what happens.