The RSPCA is appealing for information to find the owner of two Shetland ponies. One pony was found dead and another was underweight and suffering.
The RSPCA attended South Drive in Hebburn on Friday 21 November.
The surviving pony was seized by police on veterinary advice and placed in RSPCA care.
RSPCA inspector Catherine Richardson said: “Unfortunately we haven’t been able to find the owner of these ponies so far, and are appealing to the public today to contact us with any information they have.
“One of these ponies was found dead, the other in a poor state.
“If you have any specific information please call the inspector appeal line on 0300 123 8018 and ask to leave a message for me.”
The dead pony is described as a black and white stallion. The surviving pony is a black stallion.
RSPCA inspector Richardson said: “We’ve gone as far as we can with our enquiries and have drawn a blank.
“It seems clear that these ponies have suffered a great deal, and we want to find out who is responsible for that.”