Is it best to purchase cast-for-age ewes or cull maidens? [sheep]
1993
Cottle, D.J. (New South Wales Univ., Kensington (Australia). Dept. of Wool and Animal Science)
A spreadsheet program was used to calculate the relative worth of cast-for-age (c.f.a.) ewes versus cull maiden ewes from the same source flock. C.f.a. ewes are often considered to be better value for money, as they have been classed into flock. However, when allowance is made for genetic progress in the source flock, the merit of cull maidens is perhaps higher than appreciated. If cull maidens are acceptable in terms of conformation and 'faults', the decision to purchase them or c.f.a. ewes should be made on the basis of their relative prices. Some worked examples of these calculations are presented.
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