Yes, I think #4 would leave smaller holes. On the board, I have seen hunters recommend from #2 shot to 4 Buck on yotes. If you need to save pelts, and in some areas that means money, then it would pay to pattern your shotgun at a few know distances to check your spread and density. You can always carry a few different loads for the various game you may want to hunt. Bobcats are making a comeback in Iowa. The DNR is thinking about a season. I have yet to see one when I am in the woods, but hope to soon. Anyway, I would be happy to hear how your hunt goes!