Lose $ by: $ Overfeed sows, gilts and boars $ Feed unbalanced rations $ Overwork boar. $ Use contaminated lots. $ Disregard disease and parasite control. $ Subject sows and gilts to extreme high temperatures during breeding. $ Run sows and gilts together. $ Keep inadequate records. $ Fail to isolate newly purchased animals $ Fail to vaccinate for Hog Cholera, Leptospirosis and Erysipelas Ways to make $: $ Select gilts from lines with large litter size records. $ Practice a sound cross-breeding program. $ Grow gilts out so they are in medium flesh and vigorous condition. $ Flush gilts two weeks before breeding. $ Breed gilts at third heat period. $ Use double mating breeding system. $ Decrease energy intake following breeding. $ Increase feed level the last third of gestation period. $ Keep breeding animals cool and comfortable during breeding and gestation periods. $ Be present at farrowing time.