Update: new chicks
The pullets survived their first night in the coop. The hens (buff orpies age 4years) are neither aggressive nor maternal. Lark (large, but still puppy) is extremely curious and rather clumsy. She keeps pawing at chicken pen. The chicks instinctively run for protective fluffy butts of hens. The hens couldn't care less. They observe. One hen popped a chick on the noggin for trying to steal a bug.
One of the hens seems to have sprouted spurs! WTF?