G'day HW. Judging from the responces to this thread, I would say no to the grass cutter. I've got a slasher and no one has said, "just use that." Crikey, the clean-up mess when you hit a fresh 'deposit' would be worse than mowing after a good heavy rain.
The suggestions (so far) have convinced me to 'do it right the first time' and invest in a 6' chain harrow, especially as it can be used for more than one thing depending on how you orient it. Mind you, were I going to make my own, I was drawn to the double-loop chain drag showed eariler.
Of course your problem is that it's winter in Armstrong (North of Vernon if I remember) and those droppings will freeze fairly quickly. This is a question best answered by someone with experience, not someone who lives in a place that only gets the odd frost.