I was watching my chicks today, and I noticed that Mr. Fernando, my five day old barred rock, has a clump of something on his rear end. I have wiped off poo from him before, so I didn't worry, and wiped him with warm water, paper towels, and q-tips. To make a long story short, it wouldn't come off. It looks like a dried clump of poo that is stuck under his feathers. It is just below where he eliminates from, and he still can do that. I tried pulling it gently, but it wouldn't budge, and the chick screamed and screeched wildly. What should I do?