Dog Soldiers

North Wales, two hours later: young soldier Rifleman Lawrence Cooper is taking part in an exercise designed to assess his suitability to join an elite Special Operations unit led by Captain Richard Ryan. He fails the test when he refuses to shoot a dog when ordered.
Scotland, four weeks later: Cooper is back with his platoon on a military exercise in the remote woodlands. But they're not alone as they discover when they stumble across an abandoned, blood-soaked encampment, all that's left of a Special Ops unit sent to keep tabs on them. The unit has been wiped out - all except its leader, Ryan, who has been badly injured, apparantly by a wild animal.
The platoon is soon set upon by huge, bipedal, wolf-like creatures that kill one of them and badly injure their sergeant, Harry Wells. The survivors only escape thanks to the timely arrival of a Landrover driven by a young woman, Megan. Together, they all seek refuge in a remote and seemingly abandoned farmhouse.
But the wolf pack hasn't gone away and they are forced to barricade themselves in as the vicious animals repeatedly try to break in. With limited ammuntion and no radio contact with the outside world, things are looking bleak for the survivors, but it's about to get worse - they're also facing enemies within...