CATTLE: DEFINITIONS OF USE CLASSES Icon for PDF

BEEF CATTLE
Cattle that are intended for meat production.
Suckling Calves Immature, pre-ruminant cattle (including dairy breeds intended for meat production), maintained with and dependent upon their dam for nourishment. Veal calves are NOT considered suckling calves.
Pasture Cattle Weaned Cattle Beef or dairy breeds maintained on pasture and receiving the majority of their diet from grazing. The term pasture cattle is intended to refer to cattle considered to be stockers, feeders and/or slaughter cattle. Parenthetical reference to stocker, feeder, or slaughter cattle is typically included in drug labeling.
Stockers Refers to weaned calves grazing pasture to enhance growth prior to finishing and slaughter; they are usually younger, weigh less, and are of lower condition (finish) than “feeders.”
Feeders Refers to weaned calves grazing pasture and of sufficient weight and maturity to be placed on high-energy rations for finishing; they are generally older, weigh more, and carry more condition (finish) than stockers.
Slaughter Cattle Refers to cattle grazing on pasture and suitable for slaughter. Sex differentiation (e.g., heifers, steers and/or bulls) should be indicated on product labeling.
Replacement Beef Heifers Part of  the Pasture Cattle class if the drug has been shown to have no negative impact on reproduction in female cattle during the period from weaning until first calving and the female cattle are intended for reproduction to produce calves intended for meat production.
Cattle Fed in Confinement for Slaughter (Including dairy breeds) confined in group pens and fed a high-energy diet ad libitum until slaughter. Sex differentiation (heifers, steers, and/or bulls intended for slaughter) should be indicated on product labeling.
Growing Cattle on Pasture or in Dry Lot (stocker and feeder) Weaned cattle, either beef or dairy breeds, that are maintained on pasture or in a dry lot, receiving the majority of their diet from forage.
Lactating Beef Cows Lactating beef breed female cattle that are nursing calves intended for meat production; their milk is NOT intended for human consumption.
Non-Lactating Beef Cows Female beef breed cattle that had previously nursed calves intended for meat production, but which are not currently producing milk.
Replacement Beef Bulls Part of the Pasture Cattle class if the drug has been shown to have no negative impact on reproduction in female cattle during the period from weaning until first calving and the female cattle are intended for reproduction to produce calves intended for meat production.
VEAL CALVES
Immature cattle, including beef and dairy breeds, that lack a functional rumen and are intended for meat production. Veal calves are recognized as a distinct regulatory class from suckling calves because of their handling, housing, and proximity to slaughter.
DAIRY CATTLE
Cattle that are intended for or related to the production of milk for human consumption.
Lactating Dairy Cows Female dairy breed cattle that are producing milk.
Dry Dairy Cows Female dairy breed cattle that lactated previously, but are not currently producing milk (cows between lactations).
Non-Lactating Replacement Dairy Heifers Female dairy breed cattle from weaning until first calving.
Replacement Dairy Bulls Intact male dairy breed cattle intended for reproductive purposes.
Dairy Calves Female or male dairy cattle fed a ration that includes milk or liquid milk replacer and NOT intended for veal production.
* On 21 February 2012, the FDA Center for Veterinary Medicine issued a clarification of ”dry“ vs. ”non-lactating“ dairy cattle.  ”Non-Lactating Dairy Cattle“, including replacement dairy heifers, replacement dairy bulls and dairy calves, encompass all classes of dairy cattle that have not or never will produce milk for human consumption. ”Dry Dairy Cows“ have previously produced milk for human consumption and will do so again in the future after completion of the dry period between lactations