Okay; I think this is all wonderful and though I have taught other horses in the past to do this, it has been way long ago and I remember some not-so-good incidents that happened at the time.
I now have an 18 year old that does not stand well; it really irks him and he will try and untie. Break halters, etc. to get loose. (he even broke a small tree)
Teach me to teach him, please.........
Firstly, I am not anyone, but a person who has worked and studied horsemanship and management for many years. I do take credit in having been told by an accredited trainer that I was an assest to his barn and got put on his payroll as an associate to his business. I have several issues to address here, but your's takes priority in my "mind's eye".
Secondly, I never worked with a horse in a training situation, a camping trip with our horses without a very sharp, specially made rope cutting knife. Never can know when it might have come in handy for emergencies. Thankfully I never needed it.
Idw - This is an exact rendition of what I did to train my QH mare to stop pulling back, breaking lead rope bull snaps and stand tied quietly when ever necessary, which was very often. What you need to do with your 18 y/o is get a 1/4 inch nylon rope-tied halter with braided in lead and about a separate 15 foot of 3/4 diameter nylon braided rope. Take the 15 foot of nylon rope and make a very strong, very non-slip knot with a loop big enough to go over your horse's head and hang about a foot or so below the jowl groove. Then with the knotted halter with lead attached run the loose end of the 'neck rope" back down the jowl space between it and the halter. The next step, and make this indelible in your mind's eye
, do not tie in any fashion a hard and fast tie knot of either the lead rope or the neck rope. Tie the halter lead rope then tie the tail of the neck rope about a foot or so longer. When you horse sets back the rope halter will stop him for certain, but the neck rope will be there for insurance.