I bought 2 bags last year and noted both labels had different % of certain contents. They are not nearly as consistent in materials used as Optimal is. Everywhere I was able to look at tags on Purina last summer I took pictures of the tags on same product bags and compared throughout the summer. Fillers are differing amounts, types of grains used vary a lot. Maybe (maybe) that's overthinking it, but I'm not interested in cutting corners on feed.
