CD13 Moderate Concentrate Experimental Diet This is a 50 percent concentrate diet used in the same experiment in which CD12 was fed. It also has a fairly high level of CP to ensure that growth would not be limited by protein. Ammonium chloride and white salt are included to minimize problems with urinary calculi, although levels are lower than with CD12, which is higher in concentrate. Trace mineral and vitamin premixes are those used for CD2. Chromic oxide was included …