A severely ill Shetland pony was tied to a lamppost and abandoned in Kenilworth on Saturday 10 September.
The dark bay filly was found struggling for breath after being left near Rouncil Lane, Kenilworth, next to a livery yard.
RSPCA inspector Jonathon Ratcliffe said: “I honestly thought the pony was dying in front of me when I arrived.
“She was very unwell, lethargic and had discharge coming from her nose and mouth.”
A vet was called and administered emergency treatment for strangles, paid for by the RSPCA.
“It is quite simply disgusting behaviour for anyone to dump such a sick animal.
“I would like to hear from anyone who recognizes the pony, who we believe to be less than two-years-old,” said inspector Ratcliffe.
Anyone with information should ring the RSPCA national cruelty and advice line leaving a message for inspector Jonathon Ratcliffe. Tel: 03001 234999