Police have launched a crackdown on deer poaching in the Forest of Dean over fears the animals are being killed on an "industrial scale".
Officers are attempting to stop organised gangs visiting the area to hunt illegally.
Patrick Faulkner, from The Deer Initiative which manages to the wild deer population in England and Wales, welcomed the move.
He said: "It's not the old family scene, getting food, this is now an industrial scale operation. For people now, it's all about making money by selling them on the black market without it being inspected. But those selling the meat properly will have the correct paperwork.
"There seems to be an increase in poaching in the Forest area. But it's notoriously hard to catch people. Police could be waiting for weeks and nobody would come."
Ian Harvey, of the Forestry Commission in the Dean, said it was difficut to tell if there was an increase but added poaching could be due to the rise in the price of venison.
Sergeant Simon Clemett, of Gloucestershire Police, said: "There are some organised crime groups entering the county and taking animals and we're stopping people where suspicious activity is reported."