In our case, it's only an issue if something took us both out.....the 'ran over by a bus' deal or whatever, and chances are at least one of the dogs would be with us. The whippets would go to one of several whippet folks, and Sport has lots of offers of places to go now, so doubt it would be a big issue. (And in the menatime, he would only go elsewhere if something happened to our son too, since he's his dog.)
That would only leave a couple of the jrt's...depending on which ones, they all could be rehomed....would have to look into that one I guess. (Thinking more of having something on paper so that it gets done the right way.)