I have a five week old polish with consistent messy, runny, brown pooh. He/she started out as a pasty butt chick, but never had any problem with vent obstruction. He is also quite small and despite feathering out pretty well, is still not getting tail feathers. He acts normal and is quite energetic, but "whines" a lot. He's on medicated feed, but is also out ranging around in grass and enjoying some bugs. None of the other various 20+ chicks of similar or differing breeds have similar symptoms. In addition to wondering about his health, it would sure be nice to figure this out because he's not a very enticing chick to hold right now and he misses out on some great attention from family members because of his poo issues. Any thoughts?