My mom and I have had 3 different horses where we were told when we got them (from 3 different people) that they had to be ridden in a hackamore,hated bits,tossed head when wearing bit,reared up to avoid bit,etc. (funny thing is they still did all of this with the hackamores) as soon as we got them home we tossed the hackamores and the behavior problems went away.