You'd have to grind it up smaller before you could give it though. Usually, a bird won't want anything if they have been poisoned and you need it fine enough that mixed with a small amount of water you can get it down their throat. If you saw your bird eat say...pelletized lawn fertilizer, and you had this filter charcoal? Yeah, why not? If the bird will eat it it would work. What I would worry about though is would it pass through or would it stay like grit would.