Effects of specialty proteins as alternatives to bovine or porcine spray-dried plasma in non-medicated diets fed to weaned pigs housed in an unsanitary environment

Crenshaw, J. D.; Campbell, J. M.; Polo, J.; Stein, H. H.

Translate basic science to industry innovation inherent anti-nutritional factors and enhance bioactivity of the proteins; spray-dried whole egg product (IEGG) derived from hens strategically vaccinated against various strains of Escherichia coli, Lawsonia intracellularis, rotavirus, coronavirus, Clostridia sp., and Salmonella sp., to produce specific immunoglobulin Y (IgY) antibodies against these pathogens; and soy and yeast protein subjected to enzyme hydrolysis (EHSY) to reduce inherent anti-nutritional factors and improve digestibility. The percentage improvement in growth response of weaned pigs fed diets with SDP compared to diets without SDP is greater if pigs are housed in unsanitary versus sanitary conditions (Coffey and Cromwell, 1995; Zhao et al., 2007) . Housing weaned pigs in unsanitary conditions can be used in feeding studies to differentiate the potential growth-enhancing effects of various specialty proteins used in diets. Two experiments were designed with the objective to compare growth of pigs housed in unsanitary conditions and fed non-medicated diets with different levels of APP or SDPP in Exp. 1 and diets with APP, EHSY, IEGG, or a combination of APP, EHSY, and fish meal compared to SDBP in Exp. 2. The hypothesis for both experiments was that growth of weaned pigs housed in unsanitary conditions and fed non-medicated diets containing these specialty proteins is equivalent to that of pigs fed diets containing either SDPP or SDBP.