I would also remove the metal trays. I use shaving instead of straw. I found straw gets crushed and causes lots of dust. I went down to the hobby store and bought some brown wood eggs. I still keep the wood eggs in the boxes as a reminder were to lay. My younger hens still forget and have a favorite bush. I keep the wood eggs in the boxes so when a hen goes broody it seeks out the wood eggs to set on instead of the ones that get gathered. Most of my hens start to lay 22-30 weeks average around 24.