Definitely use your Dog Food on this event as you can get some very good units from it. It might not be as good as some of the other events, but if you have to use your Dog Food, you should most likely role on this set. All of the units here doesn't have as good stats as other banners, but they are easy to level up and great from early to even late-game! Additionally, the added bonus of being Traitless means that strong Traitless units will rarely have many cats that can counter them.