I was comparing the guaranteed analysis part on the bag to Wellness. Merricks didn`t list anything but protein, fat, fiber & moisture. Wellness had all sorts of things like calcium, phosphorus, vitaminE, Omega 6&3, Beta Caratine, DHA(for brain development) lycopene,taurine, & micro organisms listed on it`s bag. I went ahead & bought wellness & mixed it with the Blue Buffalo she didn`t like it much though. I bought my senior Merricks for seniors & she liked it pretty good.I seen on the bag that you can put water on it to make a gravy. That`s neat. My baby acted like she would rather have the seniors Merricks than her Wellness. KIDS,KIDS,KIDS!!!!!