My ten chicks are almost 3 weeks old and really thriving in their brooder on my back porch with a heat lamp. They have grown exponentially, and are fed medicated feed by Purina. I clean the brooder about 3 times a week, completely removing all the shavings & line with new newspaper. They are in a very large cardboard box, which, of course, I cannot really clean. This evening, I noted 2 piles of reddish poop. Really just a tint. I have introduced a watermelon slice a day for the last 3 days (with grit). No one, and I mean no one, is acting sick in the least. Would you be worried about the reddish poop? It is not frankly bloody. Is Cocci poop really bloody?