We don't feed "pure" flax seed. We use a product called "Omega Shine" that is a stabilized ground flax seed, along with psyllium (same thing found in Sand Clear), yeasts and other goodies. It works very well for us - daughter had a very sick, skinny colt that is really starting to look good after only thee weeks. I think we've found a supplement that we will continue to use. It's a little pricey - $35 for a 20 lb bag, but the horses only get a scant 1/2 cup morning and evening, so for our six horses, a 20 lb bag lasts nearly month.
Plain Old Dee, horses Dancer and Rain I believe in dragons, unicorns, good men and other mythical creatures!