Helminth Infections in Relation to Restricted Feeding on Range

Abstract

THE following experiment was initiated to provide additional information on the factors affecting the growth of replacement stock on range. Parker and McSpadden (1944) revealed that lots of pullets raised on pasture were heavier, had lower mortality rates, consumed less feed, and utilized their feed more efficiently than those on bare range. Todd and McSpadden (1947) concluded that the supplemental green feed of pasture did not prevent parasitism, but it did apparently enable birds to withstand greater parasitic burdens. Todd (1948) examined four groups of birds, one group on a bare lot and the other three on variations of pasture. The present work considered standardized pastures in conjunction with degrees of restricted mash intake. PROCEDUREIn each of the four successive summers (1951, 1952, 1953, and 1954), prospective replacement stock was divided into four groups and placed on range as follows: Group 1 had access to an all mash ration …