So a little bit of background first so I give all the information I can. I've got 6 chicks, around 5 weeks. I was told they were all pullets but I'm about 80% sure I've got one cockerel. They are just now starting to finish getting their breast feathers. I do believe they are Australorps but I am not 100% sure, I was told they were barred rocks when I bought them. I keep them in my garage which stays around 70 degrees or so. I have them in a roughly 6ft X 6ft area in my garage with pine bedding on the floor. They are on organic chicken starter, I also supply grit. I give them treats once a day usually either a treat mix or superworms. Now I totally cleaned out their cage today and noticed when sweeping up there was a bit of feathers around the pen with the bedding. Not a whole ton but enough that I noticed. I checked all the chicks and none seem to have bald spots apart from the patchiness where their feathers are coming in. I wasn't sure if this was normal or should I be concerned? If it's not normal then what could be the cause and how would I fix it?