I went to take care of my horses tonight and Buttercup, my paint mare, could barely walk. She is extremely lame on her front left leg but I couldn't find any swelling and there wasn't anywhere that was hot. I could pick up both her front legs but she almost went down when I picked up her right one. Her feet looked ok except she looked to be getting some thrush so I put some medicine on it. And her feet were trimmed about a month ago. I also gave her some bute and put Absorbine on her leg. But I can not understand why she is so lame or what is causing it. The only thing I can think of is she got into a fight with my sister's gelding and he kicked her but like I said there's no swelling or heat anywhere.