After protecting Rosalind, run up the spiraling path towards the top of the hill. You will find yourself in another field of zombie cows, complete with a strange giant mushroom growing out of the upper left hand corner. Again, if you need coins, killing the cows can be a great way to get some. Just watch out for their counter attacks. When the cows are all gone and dealt with, approach the mushroom and saw through it to initiate a bizarre hallucination. A pair of giant hands will come down from the sky and drop off a giant egg, which will hatch into a giant chicken. The chicken will then naturally try to kill you. Of course.
Back off until you have your back against the far back wall of the level. Take out your Chainsaw Blaster and shoot the giant chicken from afar. This is the best way to quickly deplete its health bar. If you approach it and attack with melee attacks using your pom poms and your chainsaw, you'll still be dealing a decent enough amount of damage to the chicken, but you won't be safe from its counter attacks. The chicken will undulate and bounce around so much that it's bound to deal some amount of damage if you get up close to it, even if you are fairly careful about dodging around it. With your Chainsaw Blaster in hand, you should be able to kill the chicken easily enough, for which you will receive many coins. After the battle, an arrow will appear over the crashed bus ahead of you. This marks your next objectiv e, but don't head over to it just yet. There's an opportunity to earn far more coins in this room before you leave.
Just like with the cows earlier, you can kill the tiny chickens running around on the ground to earn coins from each one killed. Use low chainsaw attacks (executed by hitting the A or the X button on the Xbox 360 and the PS3, respectively, in case you've forgotten; it has been quite a while since the ground-based crawling zombies have made an appearance, after all) to sweep up the chickens, killing them all and earning yourself a nice coin bonus. If you opt to chop up the chickens, be sure to get the ones hiding behind the bus stops, too. There will be one bus stop on each side of the level, one to your right and one to your left. This is of course totally optional, so those of you offended by the idea of chopping up a few innocent barnyard animals can rest easy and head on to the next objective by simply approaching the crashed bus.
Enter the bus to initiate a cutscene. Juliet will enter looking for Rosalind, but her beloved sister will be nowhere to be found. A ghostly pair of hands will emerge from behind Juliet and grab her, but when Juliet turns, there will again be nobody there. A ghostly voice will emanate from somewhere beyond the bus, warning you that "this trip isn't over yet." Great. Before whatever apparition can make good on its promise, Juliet will snap back into reality. She will find herself, oddly enough, perched on top of a tractor and ready to plow a field. This will lead you into the next checkpoint of the level, in which you will be farming zombies from atop your tractor.