Please forgive my ignorance. I am new to chicken owning! We have two milk crates that we are using for nests and I filled them with straw. I filled them almost to the top and then created a bowl shape in the middle. However, they are very full. I am now worried that I used too much bedding. Can someone tell me how much bedding hens prefer to have in their nests? I did a search and didn't see any direct answer for this. I did see one post that mentioned 2 or 3 inches for shavings. Does this also apply to straw? Thanks!