What am I doing wrong?

[Juggaloblink]

Hello, ive been following BYC for a couple months now researching everything I could before I registered to ask noobish questions but I must say I don't think that is working to well.

A little bit about my situation, I recently got me 30 cornish cross 6/11/16 from a local hatchery, it was warm enough to let them go straight outside into their 7x7 tractor, we used 2 24'' chicken feeders that I kept as full as I could ( I work 2pm to 10pm everyday ) while using a 21% protein crumble, After the first week of having them I put them on a 12/12 feeding schedule and found out quickly they were picky eaters and would not eat the finer crumbs that were on the bottom. So I had my wife who is a stay at home mom feed them a couple times a day while I was at work, but they would still not eat what was at the bottom of their feeders. I weighed them at around 3 weeks and they were very far behind what whelp hatchery said the standard was. I have had them for 6 weeks now using the same routine as I have been and my biggest birds weigh 2.5 lbs. I went out today and bought a 30 lb hanging gravity feeder, but my question to you guys is will this be sufficient enough to get them to target weight before they all start flipping?

 

[MannyB]

They may be growing slower due to the heat. I don't usually raise them in the heat of summer here, they don't handle it well. You should be fine getting them to size it may just take a week or 2 longer.