let's gather feathers.

Okay heh - Dan doesn't know zombie!ror is ror, Ror isn't going to tell him because that would reveal his identity, so as far as dan knows, it's just 'random zombie'. Which could be dangerous, he doesn't know, so he doesn't want to just walk up and poke him the shoulder and say 'hey! do you eat people?'

I had fun imagining the conversation that led to them making the bet in the first place. XD