When my chickens were free-range, I never worried about those cow-pies left on the grass because the chickens would literally demolish them into a 4 sq ft poop slick that would quickly break down. Now my chickens are more, or less contained and I've read, and observed mself that if left unchecked, this cow-pies create a "sour patch" on the grass that cows will ignore even a year later.
Should I get out there with a rack and spread them out, or remove them entirely to a
compost pile and then later add them back to the field as finished compost, or compost tea?