We ran out to get some food last night -- McDonald's, if you must know -- and pulled back into our driveway to discover a VERY LARGE ROTTWEILER and his equally large ferocious looking friend wandering happily around in our yard. The rottweiler had a collar; the other dog didn't. I think Don almost had a heart attack when they showed up in the headlights as he pulled into the driveway. We have no idea where they came from; they must be neighborhood dogs, as they certainly looked domesticated and well-fed. They trotted around in the yard for a while wagging their tails and looking for somebody to REND THE FLESH FROM, and then headed out down the driveway while we sat quivering in the car. [Don called his dad, who recommended that we a) throw hamburgers at them and run for the door or b) sacrifice whoever was in the passenger seat. We chose to wait them out, instead.]
Hilariously, one of the damned cats who normally inhabit our yard peeked out from behind the shed while the dogs were wandering around. It looked annoyed at the intruders, who were presumably keeping it from performing its usual ritual of sleeping on top of Don's car and leading him on fruitless chases around the dumpster.
Fortunately, the dogs didn't stick around or notice that there were food-like smells coming from the car, but it was a moderately terrifying ten minutes to be trapped in our own driveway. Don spent the rest of the evening muttering about fences; I think he's planning on turning the entire property into a gated estate now.