The RSPCA is investigating the discovery of a dead fox cub with rope tied round its back leg in Denbighshire.
The animal was found in a remote area of Clocaenog Forest, near Ruthin.
It had suffered a broken leg, and two loops in the rope indicated the fox may have been tied down.
A £1,000 reward, backed by Queen guitarist Brian May, has been offered to for information leading to the conviction of those responsible.
Anyone with information is asked to contact the RSPCA's national cruelty and advice line on 0300 1234999.
RSPCA inspector Fred Armstrong said: "This was a really distressing discovery and the circumstances in which this poor animal was found do make me suspicious of foul play and cruelty.
"I do not think it is likely the rope became tangled around the fox's leg by accident.
"It is far more likely that a human being tied the rope round the animals leg and therefore I am concerned that a possible offence has been committed.
"I also think that the fact this fox was found in such a remote location is again no accident and that the people responsible for the animals suffering thought it would never be found."
The fox was found by Judi Hewitt, of campaign group Wales Against Animal Cruelty.
With the help of Brian May - who formed the Save Me group to promote decent treatment of animals - she is offering a £1,000 reward.
Writing on his website, Mr May said: "Today, Judi decided to make a stand by offering a reward for information leading to the conviction of the perpetrators of this crime.
"I have decided to contribute to this reward money.
"Anybody out there want to help?"