How early is too early to start chicks (4wks) on fermented whole grains???
Everyone has their own management routine. I'm going to be starting future chicks on FF starter feed at day 2 or 3.
Fermented whole grains is a different story. Personally, I wouldn't do whole grains for chicks till at least 8 weeks and even then, a small percentage of the total intake.
Growing birds need higher complete proteins than whole grains can provide. Starter/grower feeds are formulated with the appropriate levels of vitamins, macro and trace minerals as well as protein. Many of those things are missing in grain alone.