The dog was cut down after being found by a walker
A dog has been found hanged in woodland near a path which runs alongside a children's play area.
The male bull terrier-type mongrel, aged between nine and 18 months, was found in Aberdare, Cynon Valley, in an area used by dog walkers.
RSPCA inspector Selina Chan said the blue twine with which it was hanged was thought to have been its lead.
She said: "We need the public to help us piece together the information so we can discover the truth."
The dog was found by someone walking their dog on the path.
An examination by a vet found bruising around the animal's neck and two puncture wounds but no obvious sign of death.
The dog is described as white with brown ears and a brown patch around his left eye, a brown patch at the base of his tail and three large light brown or tan patches on his body.
Ms Chan said: "The dog has very distinctive markings so I believe someone will recognise his description.
She added: "When I attended, the dog had been cut down from the tree but the twine was so tight around his neck I could not get my fingers underneath it.
"The dog was heavy and it would have taken a very strong person or possibly more that one person to have hung the dog.
"I simply can't comprehend what has happened to this young animal and how it was found in such appalling circumstances.
"I find it difficult to put my thoughts into words after removing the body of this dog."
Anone with information can contact the RSPCA National Cruelty and Advice Line on 0300 1234 999. Calls will be treated in confidence.