Its a bit like a severe colic, needs a vet for diagnosis really
Thats a worry its been in Hants, I'm nearby in surrey
, I found a link that has lots on info, but they dont really know for sure what causes it
Current research indicates a CLOSTRIDIUM bacteria in the soil, keeping the horse in good health helps them
stay unaffected, good gut health and no stress etc , but there are some environmental factors too, eg cool dry weather spells, or pasture previously affected
read here for more info and advice
http://www.grasssickness.org.uk/egsf-page.aspx?pageID=46I refuse to have nightmares tho, I already do my best to keep the pasture in good condition , and my pony healthy. Wish there was a test kit ......
Sincere condolences to those horse owners who have lost beloveds
jesse