My Maiden mare is about 5 yrs old. She has been acting strange the past five days. She is pacing around her stall. She keeps lying down and then getting right back up. Her tail head and rear end have filled like jello for about two weeks now. Today when I checked on her, her vulva seemed to be a pinkish red, and very stretched. Her udders are not full at all though and I have been really worried. She seems very uncomfortable today, Pawing the ground, stomping, looking at her belly. I need someones opinion. Help.