I also use a plastic feeder with holes at the base. If they knock out a lot of food, I take out the feeder until they eat up all the stuff that they spilled.
My chicks are wasting their food! - Page 2
I won't fib and say watching them kick food out of the feeder never to be touched again didn't raise the ole blood pressure, especially when it's like watching them poop on dollar bills!
We put a coffee saucer/plate underneath the food dish. That way it's elevated off the ground, making it difficult for those greedy little feet to reach into our pocketbooks and kick the food out... AND when they do scratch their wasteful little feet hit the slick porcelain slope of the plate. Once they were capable of keeping their balance to perch on the feeder and waste a bunch of food I put the plate underneath. The first week or so I don't worry about it as much but starting in week 2 is when the waste really seems to start.
I also DO NOT put food in the jar itself, AND only fill the base 2/3 full . (or whatever level they can easily reach in to get depending on size... but not full and not with free quart (pint pictured above) of food in the jar for them to waste. The jar is there to keep their poopy butts and feet out of the big middle portion, not to supply more once they've wasted what was there. Yes, I really hate chicks and chickens wasting food!
Chicks need around 1 tablespoon each per day in week 1, 2tbsp each per day in week 2, 3 tbsp tbsp each per day in week 3--- round approximate guideline numbers.