Recently the barn owner and I were chatting while petting his horse. My horse quietly walked up behind me and before I even realized he was there, the mare lunged at him making contact with my hand. Luckily she only got it wet with saliva and did not bite me. The barn owner backed her up but did not do much else.
Then just last week, my 11 year old daughter, who is quite tall for her age, was leading one of our horses out of the pasture when once again the same mare came up from behind with ears pinned back and tried to bite him. I got after her but doubt it made much of an impression.
They have this horse on a lease and are planning on buying her. She has had a lot of training. I need suggestions on what I can say or do.