What was the out come from your experience?The slipped tendon will not get better unless the tendon is put back into the correct position. The enlarged hock will not hold the tendon there on it's own any longer, so veterinary intervention is necessary. Finding a vet. who is willing to do the tendon surgery will be a challenge, and the surgery only works if done within a few days after the tendon has slipped out. I've dealt with this before. Definitely keep up the straightening an stretching therapies.