Okay, I wasn't sure if this would be better under tack and equipment, but I'm more concerned about the permanent negative effects this could have on my horse, and want to hear any thoughts you have while reading this. I came into the barn today and noticed my BO had decided to put a new cribbing collar on my horse without asking consent or notifying me. He is a very bad cribber, we usually use my weaver collar that goes behind and in front of his ears. He has been using it for a year, and other than minor rubs occasionally, he has experienced no pain or discomfort with it. He is very good about me putting it on and taking it off. Today, he had this new nylon aluminum strap (I think people call it a nutcracker?) and he would not let me go near him. It was on TIGHT. Again, this was put on without my consent or even knowledge of it. I tried to remove it but he kept throwing his head up, threatening to rear, and hit his head on the ceiling various times. It took me 15 minutes just to get his halter and lead on to put him on the cross ties to brush him. Here, he would not let me go near his poll / ears / neck area and when I went close to just take a photo of it, he threw his head so far up and smacked himself on the ceiling again. He was also visibly shaking, and his heart was beating very fast. My mother noted he looked very depressed. After walking him in the arena a bit I put him back in his stall (he's on stall rest at the moment for ripping his shoe off a week prior) and he would not let me get his halter off. I managed to un clip it, but he would not let me go near his poll area to slide it off. I called the BO and she thinks he may have smacked his head so hard he doesn't want anyone to touch him there. I, however believe it is an issue with the collar. He usually cribs like a mad man anyways no matter what but with this new collar he wasn't attempting at all, which is strange. By my BO's suggestion I gave him a small dose of an oral sedation to get his halter off so he wouldn't step in it but even that wasn't enough to calm him. I could touch his face and cheek, but the minute my hand was near that collar, he threw his head up in panic. My mother and a stablehand also tried, and he was not having it. He would even refuse to take my treats, which he is usually very obsessed with but this time he was not even interested. Should I be angry? I had a breakdown at the barn trying to get his halter off seeing that he was in so much distress because of this collar. The owner agreed to try to take it off later when she comes home. I am worried he will have lasting mental damage from this. I have NEVER. EVER. seen him in this much pain / stress. I guess I'm posting here in an attempt to collect my thoughts and hear whatever feedback you may have. Should I be mad? (I am) Will he have lasting damage? Is this NOT because of the collar like my BO thinks? I honestly think the only way to get the collar off him is to get a vet out to professionally sedate him... edit: I forgot while I was leaving the stablehand thought it was odd he was fine with me leading him around the arena. There should have been pressure on his poll area right? This makes me believe even more that the collar is causing him the pain. tldr; My BO put a new cribbing collar on my horse without my knowledge, now he won't let anyone near his head.