Sorry to hear about the problems you’re having with your horse. I would recommend that you first try to figure out if the cribbing behavior is due to pain from a clinical condition. A call to the vet might be helpful to investigate if gastric or colonic ulcers exists. This blog post is full of good advice and things to consider and rule out. Having good quality long stem forage to chew on all day, along with salt and water being available (if not already) would be a good place to start. Minimizing stress, . stall confinement, isolation, long stretches without forage, etc. are recommended as well.
Best of luck,
They don't feel sorry for themselves when they begin to clearly see the source of some problem in playing, and realize that it could have been avoided if someone pointed it out, or they had noticed it themselves (that tensed up shoulder they have been playing with for years). They are thankful that they finally see it, and resolve to set about integrating the new awareness into all their playing, right away. They are in fact, happy, every time they begin to become aware of how wrong they have been about some aspect of their playing and practicing approach.
You don't need to be someone else, you just need to return to the old you. So often we think that to break our bad habits, we need to become an entirely new person. The truth is that you already have it in you to be someone without your bad habits. In fact, it's very unlikely that you had these bad habits all of your life. You don't need to quit smoking, you just need to return to being a non–smoker. You don't need to transform into a healthy person, you just need to return to being healthy. Even if it was years ago, you have already lived without this bad habit, which means you can most definitely do it again.