Abstract
Egg white proved to be an unsatisfactory protein source for artificially reared piglets. Rate of gain and gain/feed were depressed, while incidence and severity of diarrhea and in some trials mortality were greater among piglets fed a diet based on egg white compared to those fed a dried skim milk diet. The same two protein sources were compared in diets of rats beyond the early suckling stage, to determine whether the effects seen in piglets are specific either for the early suckling period or for the porcine species. Rat performance did not differ between the two protein sources. It is suggested that for maximum performance piglets may require certain physiologically active components of milk not explainable in terms of classical nutrient content. Addition of immunoglobulins isolated from serum from market-weight swine was without effect for either piglets or rats. Copyright © 1977. American Society of Animal Science . Copyright 1977 by American Society of Animal Science.