If they have collars then they probably aren't wild. But if they are causing too many problems and don't leave soon. Call the animal control. They will get them.
If you don't want to call them. I would just shoot them. I remember reading a post on here a while back of a pack of dogs that had banded together to be like 15 or more of them. They went rampage on a certain neighborhood and ended up killing a young girl. No way I would let that happen.