Our TB gelding is a cribber. We had to keep a collar on him when we boarded, but now we keep him at home and do not use a collar. His cribbing occurs mostly around feeding time so we just reinforced the fence planks in the area where he most indulged. We’ve been through several feed tubs in his stall too. He’s a healthy horse who is turned out more than he is in his stall. I feel it’s a condition that can’t be cured, so we just manage the surfaces he cribs on and let him be.