Dairy Dictionary Hormone   A chemical messenger from one cell (or group of cells) to another. Hormones are naturally produced by nearly every organ system and tissue type in a human or animal body. All milk naturally contains hormones. References to hormones on milk packaging refer to whether the dairy farmers producing that milk use a supplemental hormone with their cows. Select a Dairy Term Below Antibiotic Factory Farm Milking Shorthorn Artificial Insemination (AI) Family Farm Nutrient Management Plan Ayrshire Forage Organic Milk Biotechnology Freestall Barn Pasteurization Bovine Fresh Cow Pasture Brown Swiss Guernsey Pesticides Bulk Tank Hay Processing Plant Bull Heifer Raw Milk Butter Herd rBGH or rbST Butterfat Holstein Replacement Heifers Calf Homogenization Rumen Casein Hoof Trimmer Ruminant Cloning Hormone Runoff Colostrum Hutch Silage Compost Irrigation Silo Cream Jersey Skim Milk Cud Lactation Somatic Cell Count (SCC) Curd Lagoon Teat Dairy Dictionary Mastitis TMR (Total Mixed Rations) Dairy Nutritionist Methane Digester Udder Dry Cows Milking Machines Veterinarian Ear Tag Milking Parlor Whey