I was outside with two of my week old chickies. They fell asleep on my shirt. After a while a brought them back inside- but when I did I noticed something wet on my shirt. At first I thought it might just be a little chickie poo, but when I wiped it off, I realized that it was actually blood. I searched both babies very carefully- no broken toes, no cuts, their chickie butts are clean. I'm certainly not bleeding- and the blood on my shirt was in a perfect little droplet, meaning it couldn't have fallen from a distance, or it would have splattered, ick. Anyway, where could it have come from? Should I be worried?