I have two, 3 week old porcelain d’uccles and one is literally not growing other than it’s little wing feathers. It did have pasty butt for a while but that has stopped. It eats and drinks, scratches around with its feathered sibling, etc. It peeps, A LOT and wants to snuggle…A LOT. But seems fine otherwise. I’ve had chickens for 12 years and never experienced this before. Is it possible it’s has dwarfism? It’s just so so tiny!