I ended up tossing both batches, they started smelling like beer, the Chick batch grew yeast!
The chicks love it so far, but I have to practically have to force the hens to eat it, picky little bittys.
Do I always add feed to it or can I do an all grain FF (the hens pick the oats out) and give it as a supplement?
		
		
	 
 
Growing yeast isn't necessarily good or bad, but getting alcohol smell isn't good. There's a chance you could have salvaged the batches by mixing in small amounts of it to a properly fermented batch until it was all used up.
 
You could just try again, or you could add a small amount of a starter. Any of the following would work: live sourdough starter, a splash of live fermented sauerkraut or pickle juice (not too much due to the salt), buttermilk (make sure it says "live cultures" on the package), milk or water kefir or perhaps even a probiotic capsule (opened and mixed in). You wouldn't need much, perhaps 1/4-1/2c per 2.5 gallon bucket, mix well. Once you get a batch going well (with or without a starter), you should be able to just keep adding feed and water without the need for more starter, as the microbial balance has been already established. Yogurt isn't the best starter due to the fact that 
l. thermophilius (the bacteria that makes milk into yogurt) requires about 110F to culture properly, great if you live in Death Valley, but otherwise...
 
You can ferment just about anything you want...feed, oats, grains, etc. You probably wouldn't want to ferment soy by itself without a starter because if the soy was sold as animal feed, it was most likely heat treated, which would have killed any of the beneficial microorganisms on it. Fermenting soy as mixed into a formulated feed or simply with grains would be just fine because the beneficial bacteria would be present on the grains.
 
Here's what I did with FF at first...I made a very small batch (1/2 gallon) and fed it to them as a treat in the afternoon. I did this for about 4-5 months, not that you'd have to to do that way or that long. It doesn't really matter what I feed them (well it does to an extent) as a treat in the afternoons, they just get excited as to whatever it is. Then I started feeding them about 2/3 of their daily feed intake as FF and they gobble it up. Mind you, when we put them up for the night, I block access to their dry feed. When I come out at 7 or 8am to feed them the FF, they've been up for a few hours and are hungry. I feed them the FF and just before leaving for work, I unblock their dry feed and also let them out to range. They eat much less dry feed this way.
 
I also found I had mixed in WAY too much alfalfa pellets into their last 2 batches of FF and they didn't like it. I diluted it a LOT with more water and regular feed and they are now once again gobbling it up.