In most cases, farm flock operations in Iowa feed lambs from birth to market. The primary objective is to maximize rate of gain to get lambs to market as early as possible. Additional benefits of this strategy are improved feed efficiency and lower fixed costs. This goal, however, of maximum gain may no longer be the most desirable since the lamb market of late does not seem to be following historical averages with peak prices around Easter and high prices in May and June followed by falling prices through the remainder of the year. One must evaluate the most desirable marketing date and lambing season to determine the best method of feeding the lamb crop.
Morrical, Daniel G., "Lamb Nutrition and Feeding" (2003). Animal Science White Papers, Technical Reports, & Fact Sheets. 4.