awh, well.. you can ask what they thought they saw, and from the looks of it, you might want to consider seeing a new vet. this one seemed like he ripped you off. it could of been the dog food, maybe he had a reaction to it.
Did they say he was obstructed?I really dont know what to tell you to do.I would thought that they would have x-rayed him right before doing the procedure.How long had it been before they had took the x-ray that they did the procedure?