Were these the same chickens that had poopy butt? I hope I'm remembering correctly (there were a few posts this week). I'm just curious, if there is a chance of coccidiosis, if any precautions are taken during butchering (anyway, it's cooked off when you make soup!).
My neighbors keep telling me that older birds are not as "tasty". Now that you might be/plan to be(?) butchering regularly, do you plan to, if possible, choose a certain age for your birds? Like, would you wait until they are this age or older? I see how tiny my 13 week old pullets are and wonder if they would even be equivalent to a soup chicken ("suppenhuhn") from the supermarket. I guess that is what you meant by 3 11-week old roosters for 1 store bought?
Cogratulations!! That is indeed a lot of chickens to butcher and clean up in that time period! I've done a lot less in 3 hours on a Saturday!

Looking forward to hearing about your comparison experiences with using the cone.