Interesting order here; I don't see any way in which you would ever get your 2nd choice at least with my understanding in the way the draw is run here in CO. You should probably put your bull as the first choice, however in doing so it will lessen your chances of a cow, so if there aren't leftovers in 80/81 I would worry about not drawing. The way I understand it they will process everyone using a PP by the number of PP first; followed by everyone's first choice. After that everyone's second choice, then 3rd, then 4th. So from my understanding it will be practically pointless to apply for E/S or bull after round 2 and it is highly unlikely in round 2. There are only a few species, such as sheep and goats, that are not done this way and are a weighted lottery (once you have 3 PP).