Try a little oil on their butts after you clean them and trim any fuzz or feathers around their vent too. If it can't stick to anything it might not build up. I find different feeds make them get more pasty butt. Coop chick started seems the best I have tried. Edwards and Tuckers both give pasty butt to LITTLE chicks.
I walked thru with chick, oil, and qtips and my dad asked if we were having fried chicken already, lol. I have the chick starter, usually have good luck with it. This is my "runt" so we'll see.
