When we got Lucy at 6 weeks old, her dam was nasty tempered to everyone except me. I was the only one she would allow in her stall. She sent the vet over the wall! She kick down the same wall because there was another mare in the next stall. At that time, I really had no knowledge of horses but she let me go in the stall on the third day after meeting her. I never felt threatened by her. She did charge at me one day in the pasture because Lucy had wandered to the other side of me. Maybe chalk it up to dumb luck, I just stood there and she veered off at the last second but never kicked out or tried to strike at me. After that she didn't care if I was between her and Lucy.
I've seen some moody mares but that was with their owner. I could take the same mare and have no problem.
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