Effect of spray-dried porcine plasma protein on feed intake, growth rate, and efficiency of gain in mice

One hundred eight mice were weaned at 21 +/- 1 d and allotted to four dietary treatments: 1) control, 2) control + 4% spray-dried porcine plasma protein (SDPP), 3) control + 8% SDPP, and 4) control + 12% SDPP. Daily gain for males increased with increasing SDPP during wk 1 (P 0.01), wk 2 (P 0.01), and for the entire 3 wk (P 0.01). Daily gain increased quadratically with increasing SDPP for females during wk 1 (P 0.05). During the 3rd wk, ADG decreased for females with increasing SDPP ( P 0.05). Daily feed intake increased linearly (P 0.01) with increasing SDPP in all periods. Gain-to-feed ratio (G/F ) increased with increasing SDPP during wk 1 ( P 0.01) and for the first 2 wk (P 0.05). During wk 3, G/F decreased with increasing SDPP level (P 0.01). Gain-to-feed ratio of females responded quadratically to increasing SDPP during wk 1 ( P 0.05), whereas G/ F of males increased linearly with increasing SDPP level. Gain-to-feed ratio for the entire trial was unaffected by treatment among females ( P