Wilderness (2006) on Netflix

In a juvenile detention center, the inmate Dave commits suicide after being abused with his friend Lindsay by the sociopath bullies Steve and Lewis under the indifference of the other cell-mates. The governor sends them to an uninhabited island to improve their relationships and characters under the command of the tough monitor Jed. They meet another camping with female delinquents under the command of veteran soldier Louise and they camp in another area. However, when they are attacked by a pack of dogs and a mysterious man with a cross-bow wearing camouflage, they join forces fighting to survive under the leadership of Callum.