My flock has been in a brooder in the garage with a heat plate and they're now 2 1/2 weeks old. I didn't anticipate the speed they'd grow OR how messy they were. I have to move them out of that brooder because they essentially sit in their own crap unless I change it twice a day. I built an 8 x 10 tractor with 4 x 8 of it covered with a tarp (top and sides). The tractor is within an electric net fence to keep predators out. The temperature will drop into the 50's at night and they don't have roosts so they'll be on the ground. Should I run an extension cord and throw the heat plate out there? The heat plate is only 16" x 24", so I don't know how many birds this size will get under it. Opinions and advice appreciated.