Hi John,
I think a 4 x 8 coop will be a little small for 10 chickens.
I have read that each chicken needs a min. of 4 square feet.At 4 x 8 that is 3.2 square feet.
They should be fine until they are fully grown.With 3 less roos things might calm down.
My coop is 8 x 8 for 12 hens.
Just a...