G'day and welcome to TBN from Downunder.
I'm guessing that you're talking about horse manure? There are pull-behind, 4-stroke powered, manure vacuums available for collection. Some other models are wheel powered and act as a sweeper.
Failing that you could rig a fence gate, with tyres chained to it (and/or on top of it) for weight, to act as a chain harrow to spread... then use the mower on a low height setting to mulch the balls of manure up.
That's what I do to improve my paddocks. Move the 'boys' to the next paddock, chain harrow the old one, then mulch with the Lawn Tractor. It works a treat!