Thanks for the replies and advice.
I'm gonna give Bob a call at Tyler Fish Farm and talk to him to see what he has and advises. I don't see what harm it could cause to put the fatheads in now so that's for sure.
The idea of putting CNBG in now is one I hadn't considered, but it's an idea that I like. Especially the part of getting a head start on spawing in the spring.
Thanks,
Eddie