She dosn't have any physical damage other than a slight bump...

She dosn't have any physical damage other than a slight bump on the head. So we don't know if she was taking the horse to the pond for a quick drink and the horse spooked. Got bit by a bee. Who knows what. The horse may have bumped her in the head. She fell into the pond. It's not too deep but full of muck and she wasn't able to get out.