My 9-month old hen has been trying to scratch her crop with her foot. Reminds me of a dog using his paw to scratch his chin. When she's poking around in the yard, her foot comes up to her crop and it looks like she's high-stepping, but she seems to be intentionally scratching it. I thought this might be a sign of an impacted crop (like constipation of the throat) So I gave her a couple drops of Mineral Oil yesterday. Has anyone else experienced this behavior? My four other hens do not exhibit these symptoms. Poop looks normal, but with five of them it's hard to tell who made what.