If you go to the Website of Mazri it will also show it is no longer preserved with natural vitamin preservatives but since being bought out by Purina Pet Foods is now preserved with a Chemical called BHA which has been documented in many countries as a major cause for Cancer
Purina also immediately lower the Protein levels from 18% down to a measly 16%. As of March the 23% protein Mazuri is still preserved naturally but Purina Pet Foods is known to change all produced foods to BHA and BHT preserved.