There are many manufacturers of chain harrows, which include different 'combinations... or you can knock-up your own (many TBN threads on that subject). My own (manufactured) has two sections; the first uses 5" V-shaped tines followed by a section of 'horizontal bar' ground effect chains. I'll pass the manure one or two times to break up the manure balls and then use my lawn tractor to mow/mulch the manure even further. If the manure is thick & compacted (especially around a hay feeder) I'll use a landscape rake to break it up.
Another implement that you'll appreciate will be a '
ballast box' on your 3PH (3 point hitch) as it doesn't stick out the back of your tractor as much as using a slasher/bush-hog as a counter balance.
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