Good move on following your "gut" and protecting your children first then your home. I probably would have done all you did in securing chlidren and home, THEN called animal control to alert them about a stray pit bull in the neighborhood.
By the way, my husband works with a guy who knows every
thing. From brain surgery to firearms just ask him! I just tell my husband what a lucky guy he is to work with someone so very knowledgeable!

hahahahhahahaha