I'd be concerned that what you are feeding them isn't balanced for the chicks. I would not feed what you have as their primary feed. Get some chick starter and keep this for treats only. You could go dig for worms and bugs for some protein and even add some oatmeal or such into your blend...
First of all, peanuts will be WAY too big. To start the chicks off, stick with chick feed. Once they get a bit older you can add treats but don't give anything that you don't know for sure that they can eat. As for your picture, I can't tell what it is. If you go to the learning center tab...