The only remains left of the burnt animal, dumped in Llanbeblig cemetery, Caernarfon, were its collar and some bones.
One anonymous member of the community told The Daily Post: "I was walking in the churchyard a week last Monday about 9am when I saw a burnt dog, with the remains of a wheelie bin burnt around it.
"This is a disgrace. Who in their right minds could do such a thing?"
“It must have been a big blaze, and I'm surprised no one saw or heard anything. I was there on the Saturday so it must have happened between then and Monday. I presume it was dead when it was put in the bin as it was a big dog.
“I rang the police, and they got in touch with the RSPCA, I gather they got the council out to clear it.”
A spokesperson for the RSPCA said: "An officer was called to the incident and can confirm it was a brown lurcher cross, it was wrapped in a blue blanket. There was no tag or microchip, thus we can't identify it. There is no way of telling if it was alive or dead when it was burnt.
"We would appeal for anyone with information to get in touch on 0300 123 8018."
Councillor Tudor Owe, echoing the sentiments of the general public, said: "This is a disgrace. Who in their right minds could do such a thing?"
Sadly the dog's owners could not be traced, so they have yet to be notified of the tragedy.