i have a cage about 4x4 that i am currently raising cnbg in. i bought 200 in early spring at 3-4". i lost about 25 or so within the first week or 2. the rest are doing awesome. i hand feed them aquamax 300 several times a day. i feed them 5 or 6 times a day if i am around the house, but almost always twice a day. i feed them until they won't take anymore each time.i am trying to get them to as close to 6 inches as possible to keep bass from eating them upon release.
i have posted some pics on here before of bluegill they take up in the cage. if you throw feed in your empty cage the bg will come to eat and eventually stay until they are too large to get back out of the cage. i have done it several times.

Scott Hanners