Remy410- my mare is 10y.o. And moved 30 days ago to the first new barn she was ever at....she was born at the previous place. She was fine when she went out of heat and yesterday she was just the nosie lovely horse I know she can be :) I'm not sure if our horses will eventually even out. We went out yesterday in the front pasture by ourselves for a ride for about 20-30 minutes and she called to her buddies 5 times; she didn't try anything funny and she walked calmly back to the barn. She seems to only be 'mareish' for 4 days and then it's like someone flips a switch and she's back to normal.
All I can say is my next horse will be a gelding for sure lol Don't get me wrong, I do love my horse! Big brat and all