Trees can bend naturally, from many causes. But if the end of the tree is weighed down by another tree, a log, or rocks then it is Sasquatch. The tree bends are trail markers and show other Sasquatches the way of the trail since the families and clans split up to forage for food.
Sasquatches will also build odd tree structures. This photo is of a pyramid, three saplings placed in the shape of a pyramid and perfectly balanced. Just look for anything out of the ordinary and consider if it could have occurred naturally.
Don't worry about your dog, Jeremy. Dogs have incredible senses, and if there is a Sasquatch nearby, your dog will let you know.