I have a frizzle who was born around the 7th. I also have some buff orpingtons that might be 2-3 weeks old. The size difference is amazing. But my frizzle is about the same size as the other 7 chicks in the brooder. Are the BO chicks older than I think or is she running smaller? She is about the same size as the 1.5 week old barred rocks. This is Maddie. This is Maddie next to Mable. This is everyone at there favorite past time. I deep litter the playroom side of the brooder and every other day I "fluff" it. They spend hours scratching around, trying to get to the bottom.