Farmer Greg Davies said 42 wild boars were still unaccounted for Six people have been arrested after wild boars were released during a burglary at a farm in Bridgend county.More than 40 of the animals could be roaming the area after they were released from their pen following a break-in at Llangynwyd, near Maesteg, at 12:30 BST on Sunday.
Farmer Greg Davies holds a dangerous animals licence and had fencing to prevent escapes, said police.
Anyone who sees the boars is advised not to approach them, but to call 101.
The break-in at the farm took place at 12:30 BST on Sunday 
Wild boars are usually nocturnal and can travel up to 30 miles a day searching for food South Wales Police said although the animals are not an immediate threat to the public, they may charge anyone who tries to approach them as they will be disorientated and are not used to being out of their pens.
Wild boars are usually nocturnal and can travel up to 30 miles a day searching for food in the early morning or late afternoon and evening.
Inspector Paul Thomas said: "These animals are recognised as posing a potential threat. People should take as much care as possible.
"We are investigating the criminal damage and the release of dangerous wild animals, which can carry a sentence in prison."
Farmer Greg Davies said the wild boars escaped after their fences were cut Mr Davies said he had recaptured some of the animals but there were still 42 unaccounted for.
"We had a break-in at the farm building where we keep all the materials and all the machinery," he told BBC Wales.
"During that break-in, the people that came in actually cut the fences to get access to the building via the animal pens. Thus doing so, they released about 80 wild boar adults and young out into the wild.
"We managed to collect approximately 40 or 45 of them on Sunday morning and one or two have wandered back.
Scott Passmore, co-founder of the UK Wild Boar Association, explains what you should do if you meet a wild boar"When we did a full head count last night, we narrowed it down to 23 adult wild boar still unaccounted for and 19 young ones that have just vanished as well."
Naturalist and broadcaster Iolo Williams, the patron of the Wild Boar Trust said he has tracked wild boar in the Forest of Dean.
"They're fantastic animals, fascinating things. It's important I think that we remember they are a native animal. The Welsh princes used to hunt them so they're part of our heritage really," Mr Williams told BBC Radio Wales.
He said people in and around Maesteg have nothing to worry about with the released boars on the loose.
Continue reading the main story They were hunted to extinction in the wild in Britain in the 1600sThey made a comeback when they escaped from farms where they were bred for meatAn adult boar weighs three times the average weight of a manThey have four continually growing tusks which are used for fightingWallowing in mud and water protects them from sunburn and biting insectsSource: BBC Wildlife"They have a bad reputation and I don't understand why," said Mr Williams. "They are very secretive, they are very shy and probably the first thing they'll do is they'll head for woodland cover."There's quite a bit of woodland up above and at the back of Maesteg there - forestry plantation and I'm pretty sure that's where people will find most of them."
He added: "They're fascinating animals and an important part of the woodland ecology as well. They turf up the woodland floor which helps new plants and flowers grow, which helps insects which helps birds."
Asked whether the wild boar can be a problem if they turn up in a garden, Mr Williams added: "All you have to do is just open the door and off they go immediately. They do not want that contact with people."
