>Yes I have horses and you can only feed linseed whole boiled (4hrs or so - >goes really gluggy) or ground linseed is OK. Great for their coats, and puts >weight on them. Cant say I ever knew about any toxic cyanide. Just know you >have to boil it or they can get sick. Although why would ground linseed be >OK unless its been treated (say heated) before being ground. > Lin seed when rehydrated produce an abundant mucilage around the seed ( kind of transparant jelly) horses being easely subject to colic ( when fed unaturally) that might be the reason why it is not good to. give whole seed to horses who will necessarelly swallow a lot of them whole and will not be able to assimilate them once grounded it will be fine . From experience , eating rehydrated flax seed it is almost impossible to chew properly ,it is too slippery. jean-claude ( who raised horses free ranging in the moutains of pyrennees and who didn't need to supplement his horses with lin seed or whatever.)