I ordered my flax from the health food store when I couldnt find it anywhere else. I get a 50 lb bag of whole flax at a time. I feed around 2 cups a day. I grind it just before feeding as that is how it is the most nutritious. People will argue this, but in my own experiments, I have found the best results come from feeding it this way. Its the only supplement I feed with the exception of rice bran sometimes. Good stuff.