Thank you to everyone who commented and e-mailed about Mollie-dog. Your words were very helpful to me.
The latest report is that Mollie-dog has settled in at her new home without a problem. B's dad's house has tile throughout, so Mollie-dog is enjoying sleeping on the cold tile during the heat of the day. His house is also out in the middle of nowhere, and there are deer and raccoons and all sorts of other creatures for Mollie-dog to sniff around after.
I think she'll be enjoying her retirement years.
We're still adjusting. It seems strange not to hear her collar jingling or her nails ticking on the floor. The girls are handing things well. We haven't had too many bouts of tears, but we have had requests for a visit. We'll make that happen in the next week or so.
In the meantime, Grey Kitty, the stray who adopted us three years ago and who lives on our front porch, is getting lots of extra love, which she's not sure she appreciates.