One time I stunned a friend by offering to clean out his chicken coop on the condition I could have all the debris. His coop had never been cleaned so the poop had been decomposing in place. I spread it right on my garden without problems.
However, I've tried using my own chicken manure to augment garden soil, and I have a problem with it being too high in nitrogen for some plants like tomatoes. I live in a very arid climate and with a drought these past years, it takes years for chicken poop to break down and quit being "hot".
As far as poop goes, it's one of the highest in nitrogen so you need to be careful with it.