I have two hens and a duck, living in a coop around 5 by 2 metres with no concrete, just dirt underneath. I am not allowed to let them walk around free for a whole day so I only let them out for around a half our each morning and sometimes later in the day. Anyway, it is ALWAYS raining at the moment in Australia and every time it does it gets all muddy (of courrse, they have a shelter to keep dry). Anyway, i have not got any straw at the moment and when i did it was the perfect solution. How would i keep it clean without straw? I have put a kind of cover on the ground so that they'd be walking on it rather than dirt. I have also put some rotten pumpkin patch remains down. Any other ideas?