I raised one batch of meat birds starting them in October and finishing in December. They had to stay in my garage under lights to stay warm for longer than I would have liked...having 17 half-grown cornish cross chickens living in the garage did not make for happiness in my house!! So I won't do that again. I was thinking about starting them in March or April and finishing in May. That may not work for us though due to being out of town. How about starting in August or September and finishing in Oct/Nov? My concern is that it may be too hot for them in either my garage or in the chicken house while they are chicks. What's your experience? I know they are susceptible to heatstroke.