 During a given week , there were either 0 or 0 replications of each treatment , resulting in 0 total replications over 0 wk . The 0 test diets ( fed from d 0 to 00 ) were formulated to contain 00 . 0% CP by using analyzed nutrient compositions of rice protein concentrate , salmon protein hydrolysate , whey protein concentrate , or spray-dried plasma protein . The fifth ( N-free ) diet was fed from d 00 to 00 to estimate basal endogenous losses of CP and AA , which were used to calculate SID . Ileal digesta were collected and analyzed , and AID and SID values were calculated . Apparent ileal digestible Lys , Met , and Thr values were 00 . 0 +/- 0 . 0 , 00 . 0 +/- 0 . 0 , and 00 . 0 +/- 0 . 0% for rice protein concentrate ; 00 . 0 +/- 0 . 0 , 00 . 0 +/- 0 . 0 , and 00 . 0 +/- 0 . 0% for salmon protein hydrolysate ; 00 . 0 +/- 0 . 0 , 00 . 0 +/- 0 . 0 , and 00 . 0 +/- 0 . 0% for whey protein concentrate ; and 00 . 0 +/- 0 . 0 , 00 . 0 +/- 0 . 0 , 00 . 0 +/- 0 . 0% for spray-dried plasma protein , respectively . In Exp . 0 , 0 barrows ( initially 00 . 0 +/- 0 . 0 kg of BW ) were fed each of 0 corn-based diets in a balanced crossover design over 00 d . During a given week , there were either 0 or 0 replications of each treatment , resulting in 0 total replications over 0 wk . The 0 diets containing the test ingredients were formulated to contain approximately 00% CP by using their analyzed nutrient compositions . 