Many thanks to all of you for your advice on how to make it through a heat cycle with an intact male in the house. We made it through with no incidents. Spence did mange to let Chloe out of her crate once but I was only a foot away. We started putting a clip on the cage latch after that. The DAP collar and plug in were a great help too!
I must say that i have never heard so much whining and calling in my life!! I don't know how you breeders handle it!! You are a brave and strong bunch!!