Well Thursday evening I got home and let the dogs out. While I was unloading groceries they got under myfeet. I tripped and fell on champ. Every since he is carrying his back leg. There's no swelling and he doesn't act like he is in any pain still playful and goofy. Only symptom is the limp. It's like a has no control over it. If you pick up on the left it just falls limp. I've had him on crate rest. What else can I do for him? I feel so bad about this. It's all my fault.