We recent had a death of out corner stone breeding mare. Her death, however, is still a mystery. After ungodly bills from her hospital stay, and no results, we are asking the community of any of their own animals who might have had symptoms? Horse was not a breed which carries HYPP positive concerns. Here is the list: -No fever -No sweating -Listless behavior -No desire to eat or Drink -Minor Colic -Mouth Ulcers -Low White Cell Count -Pneumonia (somewhat treated with anti-botics) -Neurological related weakness -Tremors and Shaking -Labored breathing -Fast Heartbeat -Blisters in the hind gut -Drooling -Stiffness -Unsteady walk -Runny nose Eventually her brain activity fell off, although her heart was still going and she was put down by staff. I wanted to do it much sooner, but the lab results were coming back the in the next 2 days, so we waited. Ruled out West Nile and HV1. We are suspect of hay which someone else gave our horse while she stayed there during our vacation. They fed her a poor quality hay from an unknown source. Much of the poor quality hay around us, is field clippings just baled up without proper curing or management of grasses. I noticed a slight cough when we were working her, but she only did it twice and showed no distress. I assumed she merely aspirated something. That is all the information we have.