This was frustrating. I was offering these chickens the world of my backyard - bugs! dirt! grass! - and all they wanted was the comfort of their run. They've slowly come around, but unfortunately the place they honed in on was the pumpkin patch. We let them have a few days of freedom in the patch, but they were destroying the leaves, so we are going to fence in the patch to keep them out. The fence has been bought and will hopefully get put up today, so until then the hens are in lockdown.
The funniest thing the "ladies" do is take a dirt bath. They dig a hole in the soft dirt of the pumpkin patch, roll themselves around until they are completely covered in dirt, and then just wallow there like pigs in mud. Here is a video of Wanda and Maude demonstrating this wacky behavior: