You might have him checked for LP just to be safe. I don't know, that might be a long distance for a young dog to walk but I wouldn't think it would cause him to limp, just act tired and refuse to walk.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |