Okay so I have contacted the owner of Desperado, my friend, where I board but I just wanted your opinion on what you guys think is wrong. The vet is called and on their way out sometime today. I went to see my boys this morning and found Des unresponsive standing in the corner. Normally he is first to the gate. I went over to look at him and both his back legs were tensing in a rhythmic way, tense, release, tense, release and he had two divots, one on each side behind his ribs but in front of his hip bone. These became more indented in his sides every time he tensed. As he tensed I could also see what appeared to be a pre-mature heave line? Could this all be related to heaves? Just worried for his sake and my guys as well. I understand heaves are not contagious but if it's something else I'm not sure. He was fine yesterday running around and being himself. Has anyone else seen this before?
**I attached a picture of where the divots appear.