I have mixed emotions about taking in a stray. Years ago, a wirehair terrier wamdered into our yard and my kids (2-4) played with her all day. This went on for a couple of days and so I began asking around for the owner. No one knew where she came from. It was about 40 degrees and raining when I came home from work one night and the dog was sitting by the back door shivering. It had never been inside. I took her in and gave her a bath. We had a fire in the fireplace and she curled up and slept through the night. From that point on, she never left us and protected the kids like they were her pups. I have never owned a better dog. She never strayed from the yard and always came when we called her. My feelings about all of this is that we were very lucky. Taking in a stray is risky and if a dog the size of the one you have gets out of control it could be a big problem. I'd call animal control before I got too attached to it. We have a 90 pound Golden Retriever....the most people friendly dog there is but he scares the crap out of me if I get close to him when he's eating something like a piece of meat.