This probably isn't the right forum to put this in, but I'd like some opinions on what could have caused this..
Mine and my sister's horse go out together during the day, and usually they're pretty quiet. Tonight, however, when I went to let them in, I found my sister's horse jumping around at the gate, rearing and being stupid. I've never seen her doing anything like that, but I continued on and let them in. Sister's horse dove right inside and began hopping/rearing around her pen, which I found odd, but left her and took my horse outside. I figured the problem was only with my sister's mare, but bringing my own horse out revealed that both were indeed wound up-my horse just contained herself better. Mine wasn't rearing or anything, but she was trying to barge ahead as I walked her, and was prancing around when I tied her at the hitching rail...neither of which is normal, as I'm sure you've guessed.
I'm thinking that it could be the weather that has them off balance-the last few days have been rainy and warm, and then all of a sudden again today it's cold and snowy, but at the beginning of winter when snow first hit they didn't react this way. Apart from that, there's nothing really I can see that would set them off so. Do you think it could be the weather? I hope they'll be back to normal soon enough..