Big Bird Charcoal is an excellent digestive aid that also adsorbs certain microbes and their toxins in the birds stomach. It may be helpful in preventing and eliminating diarrhea and coccidiosis. Bird Charcoal can be added to feed as a supplement and to their water to keep it pure. It is also acts as a natural deodorizer, of which you can sprinke directly on the coop floor or bottom of the bird cage to adsorb odors as well as a healthy grit to scratch. Charcoal is antibacterial and antiviral. Specifc granular size for the size of bird. BIG Bird Charcoal is ideal for chickens, pigeons, parrots, turkeys, etc. Big Bird Charcoal is perfect supplement to add to your adult chickens feed.