Limiting the feed intake of swine to 70 percent of full feed until the animals reach 150 pounds, did not affect the body measurements at that weight. The number of days required to reach 150 pounds was significantly greater between levels of feeding within generations. The carcass qualities of swine can be changed by limiting the feed intake to 70 percent of full feed up to 150 pounds and full feeding from then on until the animal reaches approximately 220 pounds live weight, as indicated by a significantly higher percentage of the total five trimmed primal cuts and lower percentage of total lard produced by the L.H. line. The L.H. produced a leaner carcass. The F2 H.H. had a longer carcass than the F1 H.H. but did not differ in average thickness of backfat from it. The F2 L.H. also had a longer carcass and the average thickness of backfat was slightly greater than the F1 H.H.
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H. H. Brugman (1950) studied this question.