Introducing 5 week olds to 11 week olds?

[jlj]

I have 12, 11 week Chicks, & 6, 5 week olds, I need advice on how to introduce them.
I have them in a cage in the coop fo 10 days, and I have tried to let them out twice, but the "olders" just corner & attack them.
Any Suggestions?

 

[cterbizan]

I would just let them out for little time periods daily and everyday expand the time like 5 mins. By the time that they need to be joined together they should be civil.