Hi! So, I have eight chicks and nine bigs. I've been bringing them (chicklets) outside for see-but-don't-touch sessions daily since they were about a week old. They're coming up on four weeks and it's going pretty well. I have a totally simple bigguns' exclusion method: plywood with small gaps on either side of the run. I keep them in the secure run during the day--the bigs can get in the coop but not the run. Then when I get home, I open the run up and hang out with them all, a book and a glass of wine. There has been digging on both sides of the board--looks like whack-a-mole.
Here are a few pix.
