He was found in the Nantyglo area and was taken into RSPCA care on Tuesday 19 December.
The four/five month colt was found in a poor condition and was not microchipped – so an owner had not been located.
RSPCA inspector Christine McNeil said: “Unfortunately as he is not chipped we have not found an owner and we are now hoping an appeal for information may be able to help with our enquiries.
“If anyone has any first-hand information that will help our enquiries please do get in touch and call us via 0300 123 8018, quoting 1197723.”
The foal has been taken into RSPCA and has been named Sprout.
