OK per Saanedoah.com in Goat 101
Tetracyclines are widely distributed to the heart, kidney, lungs, muscle, pleural fluid, bronchial secretions, sputum, bile, saliva, synovial (joint) fluid, and ocular fluids.
DOSE #2 : Can also be dosed at 3ml per 100 lbs. (6 mg/lb) once daily.
Effective blood levels are achieved in 2-4 hours. The serum concentration peak occurs in plasma by 4 hours