Hi everyone! I recently moved and we inherited chickens! We always wanted them so we are so very excited and loving them! I’ve been researching and I cannot find anywhere this method done for a run, any thoughts or advice? The run has large rocks and I can’t find any reason online to do this. Or any suggestion to ch age it up for it to be better for our ladies? Thanks in advance! I’ve considered filling in with construction sand or even gravel? Not sure what would be best for them.