Animal Science Terms - T

Tapeworms: long, ribbon-like segmented flatworms that can inhabit the gastrointestinal tract of animals

Tattoo: permanent identification of animals produced by placing ink under the skin, generally in the ear, or in the tail web (of the LaMancha goat) using a tattoo gun with digital (sharp needle-like) numbers

Teaser: male that has been vasectomized (castrated bull) and is used to indicate which females (cow) are in estrus

Teat: appendage (nipple) of a mammary gland that the baby suckles to get milk. Dairy cows commonly have four teats on a single udder

Teat dip: solution dipped or sprayed on the cows’ teats after milking to seal the teat to prevent bacteria from entering and causing an infection

Tetanus (Lock Jaw): condition caused by poisons produced by Clostridium tetani which is a bacterium found in the soil. Symptoms usually appear within 7 to 14 days of exposure and include stiffness and soreness that progresses through the body until the whole body is paralyzed within 48 hrs of first appearance

Textured: feed ingredients containing fine materials in a pelleted form, mixed with coarser ingredients

Tom: adult, male turkey

Total Digestible Nutrients (TDN): measure used to indicate the energy in a feedstuff, comparable to digestible energy in accuracy. Also indicates how much energy an animal requires. A pound of TDN equals 2,000 calories (kilocalories). TDN tends  to over-estimate the energy value of roughages in comparison to grains

Total Maximum Daily Load (TMDL): regulatory term in the U.S. Clean Water Act, describing a value of the maximum amount of a pollutant that a body of water can receive while still meeting water quality standards. Alternatively, TMDL is an allocation of that water pollutant deemed acceptable to the subject receiving waters. TMDLs have been used extensively by the United States Environmental Protection Agency (EPA) and state environmental agencies in implementing the Clean Water Act by establishing maximum pollution limits for industrial wastewater dischargers

Total mixed ration (TMR): nutritionally-balanced blend (homogenous mixture) of mechanically mixed ration ingredients, including forage and grain. TMRs are commonly used in large dairy or beef feedlot operations. This feeding method allows cows to consume the desired proportion of forages when two or more forages are offered

Toxemia: generalized poisoning, due to soluble (usually bacterial) toxins entering the bloodstream

Toxicity: extent to which a substance is poisonous to animals

Toxin: any poisonous substance of biological origin

Toxoid: immunizing agent against toxins produced by bacteria. Most often form of immunity to tetanus

Trace Minerals (TM): minerals that are required in very small amounts. see Micromineral

Trio: group of poultry with one male and two females. They are sold as a group of three in order to start a new flock at a farm

Trot: two beat diagonal gait

Turkey: large North American bird in the genus Meleagris. One species, (Meleagris gallopavo), commonly known as the Wild Turkey, is native to the forests of North America. The domestic turkey is a descendant of this species. The other living species is Meleagris ocellata or the Ocellated Turkey, native to the forests of the Yucatán Peninsula

Type: commonly accepted standard that combines those characteristics essential in adopting an animal for a particular purpose e.g. milk, meat, wool, or work



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