Griff is slightly favoring his right front leg by avoiding pressure on the large pad but does walk on that leg with a hardly noticeable limp. He is a few days short of 5 months old. He hasn't done anything stupid or scary besides playing and running with Deja so I haven't seen a moment in which he could have been injured. I manage these sessions carefully. He is on LPB puppy food in the AM and raw in the PM. I have always kept him trim. He doesn't react when I squeeze his leg, pads or toes and there are no thorns or anything I could detect in his pads. But I won't manipulate elbows as I am not educated in this. Will take him to the vet if it doesn't resolve in the next few days. Hooray for insurance. Argh..the joy and stres of raising a GSD pup.