Redwings Horse Sanctuary is appealing for information after a colt was found dumped with a painful skin condition in Thurrock, Essex last month.
The cob colt has been named Tilbury by Redwings staff after the place where he was found on 27 May.
Vets estimate he is around 18 months old.
Tilbury was found with a severe skin condition, which meant he had lost a lot of hair on his face and body. He was also covered in sores.
Initially, Redwings senior field officer Jo Franklin put notices on his tether and feed bucket in the hope of an owner coming forward.
No one claimed Tilbury, but the following day he was found let off his tether and roaming around the Old Chadwell school site, along with several other ponies. He was then taken in by Redwings.
So far no owner has been traced.
The charity’s vets are still investigating the cause of the colt’s skin irritation and he is currently receiving treatment.
However, the Redwings is still looking for the horse’s owner and is urging anyone with information to come forward.
“We’re very concerned about poor Tilbury and urge anyone with information about his owner or indeed about his condition to contact our welfare team,” said Redwings chief executive Lynn Cutress.
“Despite his skin condition, which must be incredibly uncomfortable and painful, Tilbury is an incredibly friendly and sweet-natured chap, and our team are investing a great deal of care and attention to nurse him back to full health.”
Anyone with any information about Tilbury’s owner should call Redwings’ welfare team on: 01508 481008