Police in the Forest of Dean are warning dog owners to be extra vigilant when out walking after an illegal snare was found in Staple Edge Woods.
At about 10am on Tuesday 30 May a woman was walking in the woods when her dog got its head caught in the snare which was tied to a tree and hidden in undergrowth.
Fortunately the owner was nearby and was able to release the dog before too much harm was caused.
The snare (pictured) is home made with a metal noose and a rope which attached it to the tree.
PC Cath McDay, Rural Environemental Crime Liaison Officer in the Forest of Dean, said: "The trap is known as a dual purpose self locking snare and I believe it was set up for boar. It is illegal under the Wildlife and Countryside Act 1981.
"The rope from was tied to a tree with the metal noose propped up and open, so the dog ran straight into causing it to tighten immediately. Luckily the owner was nearby and released the dog, but it could have been much more serious, strangling the dog or even having a child run into it.
"I would urge other people walking in woods to be very careful and to keep an eye on their dogs.
"I would also ask them to report any other snares they find, or any information which would help us find the people responsible."
Anyone with information should call Gloucestershire Police on 101.