The feed I use is supplied to me and its granules. Can you ferment granules, its from my local mill.
		
		
	 
Yes, you can use your chick food for fermentation.
 
I ferment my chick starter/grower for my chicks  The fact that it is wet helps with waste, the fact that fermentation breaks down the feed into more easily digestible material, and the fact that fermented feed is full of probiotics that keep the gut in good working order all contribute to decreased cost to feed.
 
Fermenting feed for chicks involves fermenting their regular feed, whether it is a mash, crumble, or granule. 
 
Now, the type of fermentation is your next decision.  Some people do a yeast fermentation,  and others do a lactofermentation, which means utiliziing the bacteria(lactobacillus) used to make buttermilk or yogurt.
 
There are different types of lactobacilli....some work at higher temperatures, like the ones used to make yogurt...they are called thermophilic, meaning they like heat.  The other type are mesophilic starters, which means they work best at a moderate temperature.
 
If you lacto-ferment, you are most likely going to do so at room temperature....so you want a mesophilic starter.  You can use 2 or 3 tablespoons of CULTURED buttermilk as your starter, along with a little unfiltered apple cider vinegar(contains the active cultures).  Some people just rely on the yeast/bact in the air to innoculate their feed....it takes longer to start, usually.
 
I used cultured buttermilk to start my fermentation, and I use the leftover liquid/feed to start the next day's batch because it is full of the bacteria I want....just like a sourdough starter...or repitching yeast to start a new batch of beer.  Putting fresh feed in the leftover liquid and adding water to keep the feed covered in liquid is just like feeding your sourdough starter.
 
There are several places on this site and on the web that discusses all of these issues, along with various methods to accomplish it.
 
Good luck if you decide to pursue this.  I use fermentation to feed my meat birds and my layers.