We currently have 6 pullets and 4 cornish...so as you may have guessed we'll be housing 6 girls for good, but wondered do I house them all together after their time in the brooder? Can I cram all ten in a house made for 6 for a month or two (planning on 18sq foot)? Another big issue we're looking into is ventilation, I read BYC article and many others, a little confusing how to properly ventilate without a breeze in the cold/ windy MI winters? Any suggestions? Thanks!!!!