Try to get a video recording of it whenever you can. I know that this is gonna be the last thing that you think of when something is happening or your dog is letting you know that something is outside, but you need proof. Since it's an entity, the police probably won't be able to help you at all. Try to get some video evidence of its existence so that you can take that proof to a church or something. They can't not believe you once you show proof. If you don't want to leave the house, try to get a phone number for a church or something and tell them that you need help urgently. They might even be able to bless your house, if you have proof when they come over, show them. You might even be able to talk to your neighbour so that you both can get proof. Other than that, i would follow the advice of others and put salt at every entrance, windows included. Also, be careful with leaving offerings. The entity could see this as you giving it the okay to enter your home and maybe do some research on the woods where you saw it. Maybe somebody else has had issues with it too.