The pigs could cause "serious problems" including destroying pastures, crops, hay fields and fences, the Cairngorms crofters and farmers added - noting that while "wild boar and feral pigs are not usually aggressive, they can be dangerous in certain situations".
The seemingly illegal dumping has also been condemned by the Cairngorms crofters and farmers group, which said it is "extremely concerned" the pigs "could pose a significant disease risk to livestock, wildlife, and even humans".
An estimated 20 feral pigs have been spotted in the Scottish Highlands following a suspected illegal release.
The animals have been seen in woodlands near Kingussie in the Cairngorms National Park - where four lynx were dumped last month.
The park's authority has said staff are attempting to trap the wild boar and working "to ascertain the full facts" on how they ended up there.
