Ergot sclerotia from western grains at up to 2.0 g/kg were fed to sows in a minimal disease herd from breeding through gestation and lactation. Although animals fed ergot contaminated diets were more irritable, no significant effects on maintenance of pregnancy and on lactation, nor on piglet weights and growth, were found. A pilot study with similar ergot levels in rations fed to 4-week old pigs for 50 days, demonstrated only microscopically recognizable lesions in hepatocytes, renal tubular epithelium and splenic white pulp. It is concluded that levels of up to 0.2 % of ergot from western Canada in the diet of swine may not have appreciable adverse effects in minimal disease animals.