I have finally gotten the gang all microchipped! I had written a few months ago that I didn't think I could afford it as I thought there was an annual fee attached to each chip and with three dogs, it was too much for me to pay. Thanks everyone for setting me straight. Another big thanks needs to go to a friend who gave me a heads up to a daily deal site that offered half price on microchipping through the local ASPCA. I was able to get vouchers for all three dogs to get chips for $37.50! I took them on Friday and now we are all set. Even though I feel like I am very careful with keeping tags on them, I feel an extra level of safety now. Thanks for all of the advice!