***30 chickens in a 10 X 10 room was nasty to clean up..****
Back in my youth, I had to clean chicken houses with a hand held scoop shovel. Those houses held about 10,000 chickens each and it was rough! $1.00 a manure spreader load. We cleaned only in the spring and summer as these old farmers kept the litter through the winter because of the heat it produced. It kept the fuel bills low. Hot, humid, covered with litter dust, and that ammonia smell, WOW!
Laying hen houses were worse as the litter there was slicker than owl snot, wet, and smelled just as bad!
Now, houses holding 40,000 are cleaned with tractors and front end loaders.
PS we shoveled out the goat barn in the spring also to let the hay they dropped and the poo they dropped keep the barn warmer in the winter...Great fertilizer Goat manure doesn't smell. Their droppings are like deer and rabbit droppings...