This sounds strange, but I got 16 partridge wyandotte chicks this spring and about half of them developed normally, while the other half refused to roost off the ground. As their feathers came in, the ground roosting ones developed an oily-looking appearance. They are otherwise healthy, active and growing right along with the normal looking ones. I don't know if they roost on the ground because they can't fly to the roost (2' high) or if the odd feathering is a result of some disease they contracted because they roost on the ground, but there is definately a correlation. I don't mean that the feathers are actually oily, but they aren't filled out and fluffed up like the others. They look like any chicken looks when wet...the feathers are there, but they are slicked down. Does anyone know what this is and what to do about it?