I'm glad to hear both of your girls are okay!

My dogs are prone to run away
(well, Sierra is, Buddy would only follow to keep her safe)
They are both microchipped and they both wear collars with tags, Sierra Always has hers on, and Buddy's comes off at night because he walks around the house a few times a night and the jingels of his tags wakes me up.
I think I will be buying two of those breakways collars Allamerican Pup posted. Those sound perfect!!!
Once Sierra ran away with my in-laws RB Rasquel and they were saved because Sierra had her tags on, and two 9 year old boys coaxed them into their garage and read her tag and called me.