Young piglets appear relaxed with eyes closed during the active milk ejection phase of suckling. Weight gains average 5 to 8 grams per hour with normal milk secretion. Endotoxin-induced lactation failure causes weight decreases of 1 to 2 grams per hour. The endotoxin effect is due to decreased prolactin secretion from the pituitary gland. See page 605. [U.S. Department of Agriculture, Washington, D.C.]

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