As we said here, Tess doesn't like being crated in new surroundings. So when we first moved into my house, I didn't force her into her crate and accepted the fact that there would be pee when I got home.
I got a call about an hour later from our vet saying that someone had her, and they gave us his number. I was confused, but I ran right back and picked her up. Looking back on it, I'm guessing he called the vet instead of me because she had her old ID tag on -- one without an address (I had previously lived in temporary housing) and an out-of-area phone number (my cell phone).
As tends to happen in a new house, I was still figuring out the "tricks." My backdoor didn't always latch completely unless you pulled it shut hard. So even though I had closed and locked it, it must have popped back open. My storm door also had a latch problem and it wouldn't completely shut unless you carefully latched it (not usually a major issue on its own). And then my gate also had a latch problem and didn't completely shut.
Apparently, she just walked right out of the house in an effort to come find me. The scary part is that we live on a corner of two daily busy streets, so looking back it was incredibly dangerous. Thank goodness out neighbor that found her wasn't afraid to take in a little pitbull! Both dogs are always crated at home now, and we've fixed all the latches!
Has your dog ever escaped from home?