A large horse went down in a stable off Haven Road, Bucks Green on Wednesday.
West Sussex Fire and Rescue arrived on the scene at around 12.30pm with a vet in attendance.
The horse was taken to a nearby field using specialist animal rescue equipment. Workers spent almost three hours attempting to bring the animal to its feet.
Specialist lifting equipment from Crawley’s heavy rescue tender was used, but the horse was unable to stand unaided and sadly had to be euthanised by the vet.