When Dean is eating his second turducken sandwich and Sam snatches it from it we can clearly see that he's only taken two bites from it. But when they examine it later it's almost half eaten.
The New Jersey Pine Barrens forests are very unique, due to the very sandy soil (being very near the shoreline of a coastal state) and frequent forest fires, the pine trees are very young. They are densely populated, tall, slim, and very little else grows there. Thus the name "Pine Barrens." Too bad they couldn't film the outdoor scenes "on location," because the actual ambiance can be very, very spooky. The (probably) Canadian forest they chose for filming didn't appear to have a single pine tree in it! and the ground was covered in lush grass.