My neighbor has a mix breed adult dog with both a sensitive stomach and sensitive skin and coat. He is VERY picky, has lots of energy and really bad gas. He can’t have grains, chicken or beef and doesn’t like lamb or buffalo. He’s on 1 cup of Simple Wellness Lamb and Oatmeal and 1/2 cup of Merrick Grain Free Buffalo and Sweet Potato (switching from Wellness to Merrick). He really doesn’t like either one of them and eats lots of grass before and after eating.