I bought 4 1-week-old chicks at the feed store today, and on Thursday I'll pick up 5 2.5-week-olds from my daughter's kindergarten class. I'm not sure what to do about the difference in ages. I have 2 50-gal rubbermaid bins, but they grow so fast. Maybe I'll try integrating them as soon as the littler ones are feathered. Anyone have any advice? Putting them together now would be a Bad Idea, right?