If you want to have garlic flavored eggs just put two cloves of garlic (three if the cloves aren't big) per gallon of water. My DH tells people that I am marinating the chickens.
If I were doing meat birds, it may be an idea...
Maybe I can figure out how long it takes for the garlic flavor to leave the chickens and whenever I need some garlic flavored eggs, I can give it to 'em.