I've had hens in the past, and thought it was hilarious to let them run around in my moms garden and bath in the soil (and ruin her garden in the process, hehehe take that mom...) anyways, I have a couple 3 week old chicks, and only ONE of them is performing this behaviour with the pine shavings they have as bedding. (I have a pair of chicks 1 cockerel 1 pullet but I haven't been able to tell yet which is which) But if only hens bathe then maybe this is how I'll be able to tell mwuhaha. Is sand bathing something that hens and roos both do?! Or is it just a hen thing? I've never had a Roo so I wouldn't know. Thanks!!! ps. Its super cute seeing a little barred rock chick COVERED in yellow pine shavings.