Does my dog have soft tissue damage?

<p>Hi, my dog, Wally (Corgi mix, 13lb) has started to limp about 3-4 months ago. We noticed after trimming his fur in the rear and cutting his nails. He would limp every 5steps and tuck up his left leg. He never really showed any signs of pain besides the tuck-up of the leg. However, he has a special situation. He has had FHO surgery on his right leg and usually walks fast/runs on only 3 legs. When he tucked his left leg, he would only pout it up for one step and then continue walking fast/running on 3 legs (with the left leg) We went to two vets, one who was not our usual vet, said that he had tore his CCL and would need surgery. The other vet, who performed the FHO surgery took x-rays and performed the drawer test. The x-ray's showed that the bones are healthy and he said he did not feel any movement for the drawer test. The first vet, on the other hand said he felt movement. We concluded with the vet that performed the FHO surgery that Wally did not tear his CCL because he showed no signs of pain, from the very beginning. He would not limp indoors and still run around inside our apartment. The only time he limped was outdoors on cement. He has gotten a lot better as we have limited him from running and jumping. He occasionally sneaks up the bed or couch though, but we try to stop him from over-exerting himself. The vet also said that it could be soft tissue damage, that would heal eventually with rest. He said it could also be his knee cap becoming loose, and he tucks it up to realign it. Would that be a permanent thing that he will do from now on? What do you think the problem is? Is it just a bad sprain, soft tissue damage, micro tear of the CCL, or anything else?</p>