There are about a billion different brand names for this same basic chemical compound. It is a tetracyclene derivative, and is a broad spectrum antibiotic. There are differing opinions as to whether in a feed through form, in feed or dissolved in water, it is effective or not for respiratory infections. Injectable is best (Tetradure, LA 200, etc.) but certainly oral is better than nothing. Just depends on what you are treating. Many feed mills make a TC feed for cattle, usually it comes in 600 mg strength, but some mills will custom mix for you, up to 1000 mg, and most will mix it in your deer feed with an Rx from your vet. It is not recommended to feed it constantly, as with any antibiotic. Alternate regular batches of unmedicated feed so that a resistance/tolerance is not developed to the drug.
A simple google search found the following:
Tetracycline Hydrochloride
CATEGORIES: Acne vulgarisActinomycosisAmebiasis, adjunctAnthraxConjunctivitis, infectiousGonorrheaGranuloma inguinaleInfection, lower respiratory tractInfection, upper respiratory tractInfection, urinary tractLymphogranuloma venereumOphthalmia neonatorumOrnithosisPneumoniaPsittacosisQ feverRelapsing feverRickettsialpoxRocky mountain spotted feverSyphilisTick feverTrachomaTyphusVincent's infectionYawsFDA Approved 1953 NovWHO FormularyPregnancy Category D
FDS Drug Classes: Antibiotics, tetracyclinesAnti-infectives, ophthalmicAnti-infectives, topicalDermatologicsOphthalmics
BRAND NAMES: Achromycin Achromycin V Acrimicina Acromicina Actisite Ala-Tet Alphacycline Altetra Ambracyn Ambramicina Ambramycin Apo-Tetra Apocyclin Austramycin Bekatetracyn Biocycline Bristaciclina Bristacycline Brodspec Calociclina Ciclotetryl Cofarcilina Combicyclin Conmycin Cyclabid Cyclopar Dhatracin Dicyclin Dicyclin Forte Dumocyclin Dumocycline Economycin Emtet-500 Enkacyclin Florocycline Hexacycline Hostaciclina Hostacyclin Hostacycline Hostacycline-P Hydracycline Hydromycin Ibicyn Idilin Ikacyclin Latycin Lenocin Maviciclina Medocycline Mysteclin Nelmicyn Nor-Tet Novotetra Omnaze Oricyclin Panmycin Pantocycline Parenciclina Pervasol Pirocyclina Polarcyclin Polfamycine Resteclin Rimatet Robitet Sarocycline Servitet Steclin Steclin V Subamycin Sumycin Supramycin Tefilin Tega-Cycline Teline Telmycin Tetocyn Tetra-Atlantis Tetrabioptal Tetrablet Tetracap Tetrachel Tetraciclina Tetracina Tetracitro-S Tetracitro S Tetracon Tetracyn Tetralan Tetralen Tetralim Tetralution Tetram Tetramed Tetramig Tetrana Tetranase Tetranovin Tetrarco Tetrarco L.A. Tetraseptin Tetrasuiss Tetrecu Tetrex Tevacycline Topicycline Triphacyclin Unimycin Upcyclin Wesmycin Wintellin Wintrex Xepacycline