One of my buff runner girls came out of her house this morning falling onto her front with her legs streched straight out behind her. She will keep trying to move forward but end back up like this. I seperated her and checked her legs and found nothing odd except when the leg is moved forward her foot curls up. She is bright and alert and eating and drinking otherwise. Later this after noon she is standing, but is wobbly and after a few slow steps she will fall again. Does anyone have any ideas on what could have happened? Thanks!