An emaciated and bleeding horse was found lying in a field behind a Lincolnshire cemetery.
The stricken animal, which is believed to have been left after a miscarriage, was later put down by RSPCA inspectors who visited the site on the outskirts of Lincoln yesterday evening.
The horse was discovered on a patch of rough ground behind Washingborough Road cemetery.
RSPCA officers and the police attended the scene to work out the best way to proceed.
Vannessa Malone, from the Silver Florin Horse Sanctuary had previously looked after the horse when it was ill.
She found the animal when she was out with her daughter.
"We nursed her back to health when she was last ill and now this has happened.
"I'm disgusted this was allowed to happen and I have told the RSPCA and the police that too."
Spokesman for the RSPCA Katie Geary said: "Officers did attend after reports of the horse being found.
"A vet did attend as well and sadly decided that it would be in the best interests of the animal for it to be put to sleep because of its condition.