Our 3 RIR hens will be 4 months old on the 19th of July (so a little less than 3 more weeks) and I was wondering if I need to prepare for them to start laying? Should I put a gold ball into the nesting boxes? Right now there is pine shavings as bedding. Does it need to be straw? Or hay? Or something else? I know to give them oyster shells once they start laying and that I need to switch their feed. Am I missing anything? Thanks for the help! I am so ready for fresh eggs!