Okay, I'm a newbie, but I'll throw my two cents in. Since my chickens were little fluffballs of pure joy (focus! focus!) I snipped herbs from my garden finely and added to their dry crumble. I also sprinkled it on their pine bedding for them to scratch and find. They loved it, and the poo was no more stinky than before. Actually, the brooder smelled a bit nicer! When they got older, I tied up small sprigs for them to peck at, some higher to make them jump/flutter for it. Again, very popular. As 8-weekers, they still love the stuff, especially french lavender buds and leaves as late snacks in the roost area. I've fed them basil, sage, cilantro, parsley, oregano, and lavender (so far).