Pet Naturals Lawn Aid chews feature methionine, an amino acid that helps reduce ammonia and reduce lawn discoloration . We’ve also included brewer’s yeast, which contains B vitamins for a light diuretic effect, meaning dogs will urinate more with a lower nitrogen content. Cranberry extract is also included in this delicious chicken liver flavored chew to maintain urinary tract health. Keep your dog healthy and your lawn green with Lawn Aid chews. For all dogs Manufactured in the U.S.A.