Over working hog dogs, morning lameness in rear end.

I hate that you had to go through this but i did take something away from here, I've seen what we describe as the "bunny hop" type of run in some of these curs that I've been messing with, particularly through a certain female, the dogs have never developed any type of lameness at all an especially not to the point the OP has to deal with, the very first line bred litter I ever made two of the females I kept displayed this, they are pushing 5 and the one I wound up keeping my ex father in law has her and pens cows with her, and had never seen her develop any lameness at all, I intentionally moved away from her and mates and found some very close cousins that I liked better and their the ones I've centered my breeding around them, but out of curiosity I'm going to take her and have her hips x rayed...

At what age can HD be seen in pups, my next litter is going to be a pair of dogs that are half siblings on the bottom and first cousins on top and just for my sake I'd like to have the litter checked...