Sometimes small peeps can develop what is called Pasty Butt. This is very important to be aware of if you plan on raising chickens. I have had 3 different flocks of peeps and I have always had to deal with this with a few peeps of each flock, this flock included. Of the 25 peeps we have now 4 of them developed pasty butt. Basically paste butt is when the excrement from the peep does not fall free from the body and it gets stuck in their butt feathers, dries, and crusts up. This build of waste will eventually block the vent hole all together and can cause death. At the least it causes irration, redness, attention, and pecking from the other peeps. It is easy enough to remedy. All you need is a quick hand to catch the peep, a dish of hot water, an old tooth brush (preferable one that is no longer in use!), and some olive oil.