It's very ok to feed flax seed. Leave it whole as they can get rancid if the seed coat is broken. Besides, the chickens are very well equipped to digest them anyway.
I have read that 10% is the max. Has anyone ever seen a difference between the golden flax seed versus the darker seed? At the food co-op I belong to the golden seed is $.30 per pound less than the darker seed. I bought the gold seed this time, just to see if the girls take to it as well. Times are getting a bit tough so we're looking for ways to save a bit without sacrificing quality.
If you're looking to economize without sacrificing nutrition then add the flax seed to your own diet rather than the chickens'. It's a much more efficient and cost effective way of getting more omega-3 fatty acids in your diet.
I am selling organic eggs, and am wondering how much flax seed you would need to feed to be able to claim "omega 3 eggs".
I would like to know this, too. I'm not going "organic", but we are "free range/farm fresh/eggs from happy chickens not in cages and not fed hormones". I'd like to be able to boost Omega-3 to differentiate us from the other backyard egg-producers in our area.
I just learned about adding flax seeds myself. I did some research and the maitoba agriculture department offers a good article about this. However they advise NOT to make any guaranties about the eggs because unless you intend to perform tests on them there is no telling how much they are eating/absorbing. So I was thinking it might be best to say my hens diet is enriched with flax seeds to increase the level of omega 3's. Wouldn't want to be accused of any false advertising.