OK- so I received my replacement chicks for the ones that didn't make it via mail last week. I have 3 chicks that did and are doing well. I have them in one crate. I have my 5 new chicks that are a week younger in the second crate. They can hear but not see each other. Will I have integration issues with only a week difference if I combine them in 2 weeks? What's the best way to let them get to know one another... or just keep doing what I am doing, then add visual next week, then eventually put them together and see what happens?