Dexter and Jackie normally sleep with me when I dig sit. The only new thing is the other dog. Even the friend who's there with me (the one Kasee slept with) is the same.
Like I said, I'm unsure about the snapping thing because he does it to Jackie when he plays with her. I'm just afraid he'll hurt the older, smaller dog before I get in the way. We'll see how things go tonight and, if they're still difficult, I'll have my friend take Kasee home.