The Influence of Dietary Energy Level, Energy Source, Breed and Sex on Vitamin A Requirement in the Chick

Studies on Coccidiosis and Vitamin A Nutrition of Broilers

“…The higher levels of vitamin A did not significantly influence gain in body weight prior to infection. This observation is in accord with the recent work of Thornton and Whittet (1962). The improved rate in gain in body weight observed during the acute disease phase of the second experiment when the higher dietary levels were used is in agreement with the results of Erasmus et al (1960), but not those of Waldroup et al (1963).…”

Response of Two Breeds of Chickens to Graded Levels of Dietary Phosphorus

“…B REEDS of chickens may differ in utilization and metabolism of various nutrients (Nesheim and Hutt, 1962;Thornton and Whittet, 1962;Daghir and Balloun, 1963;Donovan, 1965;Yoshida el al., 1966). This may be the reason for a wide variation (Peeler, 1963) in the recommendations in the dietary phosphorus requirements.…”

The Effect of Dietary Vitamin A, Ambient Temperature and Rearing Location on Growth, Feed Conversion and Vitamin Liver Storage of White Leghorn Pullets

“…Results of the experiments evaluated varied greatly as did the source of vitamin A activity used. Thornton and Whittet (1962) reported that neither growth rate nor feed efficiency of White Leghorn chicks was influenced by vitamin A levels ranging from 800 to 3200 U.S.P. units per pound of diet.…”