Hi All, I'm thinking about raising up some meat birds in a chicken tractor in one of my fields. I understand that they go out to the tractor at about 3 weeks of age. I'm in Minnesota. I'm trying to understand about what month that I should order the chicks. I'm a total newbie. So, for example, I don't know if suppliers stop shipping chicks later in the summer. I also don't know what the outside temperature needs to be where the birds would be okay being outside. I'm trying to get the timing right to both be able to get the chicks and to make sure when I put them outside they''ll be comfortable. I'd appreciate hearing your thoughts! Thanks.