Weakened Mesentery and Intestinal Adhesions

My 3-year-old basset / beagle had abdominal surgery in October to remove some leather belts he had ingested.  They couldn't pass and were stuck in his stomach.  He had surgery to remove nearly 2 lbs of belts from his stomach.  He recovered well from this, but now just over six months later, he has developed intestinal adhesions and had to have another surgery to remove them.  While they were in surgery, it was found that his mesentery was torn in three places.  Part of his intestines had worked through one of the holes in the mesentery and became entrapped.  The mesentery was sutured, but as the surgeon was suturing a hole, another one would form alongside it.  He managed to get the mesentery fixed and the adhesions removed.  They didn't have to remove any portions of his intestines or anything like that.  My question is basically if anyone has heard of a dog having a weakened mesentery and tears and if so, how did that effect the dog's recovery / prognosis.  The vets working on my dog seemed to think it was just a matter of time before this all happened again.  I don't want to lose my dog, so I'm hoping for any advice on preventing or minimizing intestinal adhesions as well.