I have a lab mix that got hit a couple years back and broke his right hind leg.He is now as active as ever he goes rabbit hunting with me and my beagles and he can outrun my beagles.The only thing he may not be able to do is to jump up in the back of your pickup truck if it's to high,I have to help Buddy into the back of my truck,but he jumps out as soon as it stops over the side.Good luck!!