Sometime back in the 70's or so, I read a story that I vaguely remember, and I'd love to know the name and author. In the bulk of the story, all the humans leave Earth, for some reason I don't remember. The part that sticks with me is that at the very end, a group of raccoons are sitting around eating something, and one of them notices that there's a dog sitting quietly near the group. The raccoon stares at the dog speculatively for a minute, and then throws him some food. End of story. The implication is that after the humans are gone, the raccoons will be taking over as the dominant species, and the dogs are going to suck up to them.
Anyone recognize this story? I swear I didn't make this up.