There is a (VERY SMALL) body of research re: up to about 5% dried comfrey in poultry diets, generally w/o ill effect. Green comfrey is mostly water, making it low protein, and low every other thing. ...and while the allantoin may be beneficial, comfrey also contains pyrrolizidine alkaloids, which are not good - and in one study resulted in altered metabolic pathways after just a month of feeding male cobb broilers (though they were below detection limits in the meat). (Alternate source for study here, I'm not familiar with the journal in which it was published, or their peer review process.0Does anyone use or have information on comfrey as an addition to poultry diets? I use it with salves I make because the alatonin present in it promotes healing, but have always bought it dried. I was reading that it is high protein and low fiber, and several sites say that it’s extremely useful for supplementing their poultry feed. I’m wondering if there are any concerns to using it, and how one would go about preserving it for winter months when nothing is growing around here. (Dry it, maybe?)
Here is one of the sites I was reading: http://www.nantahala-farm.com/comfrey-fodder-livestock-poultry-s.shtml