I have 9 pullets and 1 cockerel living in my chicken tractor. I was given them as chicks and range in age from 9 weeks to 17 weeks. There are hawks migrating right now and I want to give them chicken grower feed so I'm trying to keep them in the tractor as long as possible. But the nights are getting colder. The nights have been dropping down a few times into the low 30's. I have a tarp over the sides and then I wrap it in two plastic tarps at night to keep the wind out. I put old fence posts inside for them to perch on. This friday will be 30 degrees with showers at night. But for the most part, its been mild enough...just damp as fall usually is. Does anyone know how long young chickens can stay in a chicken tractor in Western NY?