Sick chickens? You have to solve that issue first.
Too much green stuff + lots of moisture = will not work. Mix in plenty of dry brown leaves in alternating layers...Autumn is on it's way now, so starting in September, there should be lots of falling leaves until the end of this year.
I get most of my quality brown leaves from the family across the street that has a huge maple tree that takes up most of their entire front yard. I have two medium sized Japanese Maple trees, but the leaf volume is better over there. All in all, I must move about 15-20 greenwaste can loads per year from that one huge Maple tree. I pile the leaves into a large hole in the ground, and it stays one huge pile throughout the winter season. In the following Spring, I take the leaves off the top of the pile (the ones that didn't really break down much, but very dry from being in the sun on the top of the pile) and then I make alternate layers of partially broken down brown leaves with the chicken coop poopy shavings. Two piles per year, in Spring and Fall, I clean out the whole coop and run and build next year's compost. I like to let the piles break down for at least 6 months, but most of the time, I wait for a year and keep turning it and adding more household fruit and veggie scraps + coffee grinds and paper filters.
I have let the majority of the leaf compost pile mature year after year, at this point, I must have about a yard and a half of pure leaf compost, looks like dirt, but with no grit, just brown fluffy duff.
--Hugh