I don't know what you mean by "type of mobian", are you meaning like species such as hedgehogs and foxes? If this is the case, then well... I'm not picky on the prey species, though if I had to pick, I'd probably go for cats or chipmunks? Hard tossup between them.

As for pred, bias has me leaning on rodents easily (mice, rats etc), though that's how I'd answer outside of mobians too. As a fallback if we aren't counting that, then for a particular reason (or character) I am going to say jackals...