Cribbing can be attributed to so many causes, stress/boredom being one of the most common. Pain frequently connected to ulcers is also sadly common. I have a mare that used to crib but I found, by accident, that she stopped cribbing when I started adding a LOT of water to her meals. I suspect her cribbing was ulcer or gut related and extra water seems to be a positive thing for her. She, too, would only crib right after meals, and was easily redirected. My gelding would crib if he knew how…. he resorts to licking the walls during meals but again, plenty of water (initially for a dental issue) in his grain and now he only ‘tastes” the walls where he drools his gruel. I can’t swear by it but two for two presents a possible pattern here : )
Sure there's right and wrong but mostly there's just a whole lotta different.