@Kembe, nice post! We've gone to solid food chopped up in a food processor, but we're grinding it a bit more course as we go. So far, no puppies are choking, but good to know!
A dog would not necessarily be a bad idea in a normal museum setting but if you look at the pictures of that museum everything was displayed in such a way that it would be a huge temptation for an animal. In fact, it would be a huge temptation for a small child that was under adult supervision.