Very interesting. I know my dog won't eat for the first day when I go out of town and just lies around depressed, (talk about a guilt trip), she does this even though she is with my mother or brother-in-law who also has dogs and she love them.
I know snakes aren't supposed to do the same but I have heard of them being depressed. I know my son's snake prefers him even though I am the one who feeds and cleans out his enclosure. It makes you wonder.