I have to second Paddi here. Lost an awesome 4 year-old Morab when a
trainer put a too-large rope halter on her and tied her. She got the side of the
halter through her mouth, dislocated her jaw and paralyzed the left side of her
face. The metal end got wedged in the space between the jaw and neck and punched
a perfectly round hole through the skin, which got infected. The paralysis and
infection spread despite our best efforts and her throat became paralyzed - she
could no longer eat or drink and was humanely destroyed. I still use rope
halters, but the appropriate size and no metal ends.