Pet Naturals of Vermont - Lawn Aid, Urine Balance Supplement for Dogs, 60 Bite Sized Chews Lawn Aid is a daily formula to prevent unsightly lawn spots. It is specially designed to help reduce ammonia and nitrogen concentration in the urine that can cause burn. Lawn Aid is also designed to support bladder and urinary tract health. Lawn Aid is an all natural chicken liver soft chew that can be given daily to help reduce the effects of urine burn on lawns. Lawn Aid includes methionine and yucca schidigera to manage the nitrogen and ammonia levels in your pets urine. Lawn Aid soft chews are free of wheat, corn and artificial ingredients. Pet Naturals of Vermont products are NASC approved and manufactured in the USA.