OK, Forco is/was originally developed for horses but many farmers, ranchers, pet owners and others are feeding it to their barnyard birds because, as many of them insist, Forco helps keep their birds stay healthy. As a matter of fact, some attribute feeding Forco to their chickens as responsible for solving other problems besides digestive issues, such as feather picking. If you want to know more, a healthy discussion thread on other animal-specific web sites are not only informative but rather humorous as well.
It's amazing to what lengths animal folks will go to assure their critters remain healthy! Why not go ahead and amuse, educate yourself, all at the same time! » BackYardChickens.com
We recommend feeding 1 oz of Forco each day for every ten birds.
By the way, if you've had personal experience with feeding Forco to your other-than-equine animals let me know and I'll share your good words with others as well. After all, we all want our critters to be healthy don't we?