I have two four-week-old BRs in a pen together. I have four three-day-old BOs and one something-rather-aggressive in a brooder. The aggressive chick is all over the BOs, and I want to take her out of the brooder. Can I put her with the older BRs? Everybody is outside, and nobody is getting heat lamps - I'm in Texas and it's 95 during the day and close to 80 at night. I was going to introduce the new chick to the BRs during their free-range time this evening, and if they got along I was going to put the three of them in the pen and watch to see what happens. Even if everything went well this evening, would the BRs beat up the chick when they woke up in the morning and found it in their pen?