Garrapatas (1993)

In Los Angeles, six problematic teenagers are sent to the Wilderness Project, led by the couple Holly Lambert and her boyfriend Charles Danson. They take the van of the project and Charles drives them to spend a few days in the woods. They stumble upon the drug dealers Sir and his hick minion Jerry that advise that they are in a dangerous area. When the dog Brutus of Darrel 'Panic' Lumley mysteriously dies, Charles, his daughter Melissa Danson that is also participating in the project and Tyler Burns take Brutus to the veterinary Dr. Kates. Soon they learn that the dog has been attacked by a giant mutant tick transformed by the pesticide used by illegal planters of marijuana, and they return to rescue the rest of the group. But something unexpected happens to all of them.