The effects of space allowance and group size on egg production traits and profitability1

Abstract

Productivity and profitability of 2 commercial strains of WL [White Leghorn] were measured simultaneously at space allowances of 0.0310, 0.0387 and 0.0464 m2/bird and in groups of 3, 6 and 12 birds/cage. Space and group effects were independent and additive, the latter the more important determinant of profitability. A space allowance of 0.0310 m2/bird adversely affected production and increased food consumption, possibly the result of increased interaction between birds. Depopulation at 12-13 mo. of lay was calculated to maximize average monthly egg margin over food and bird costs and minimize the problems of egg quality associated with the aging pullet.