Texan, I went to the Maxim info for the Maxim-200 and it stated this for dosage:
DOSAGE
CATTLE
MAXIM-200 is to be administered by intramuscular, subcutaneous or intravenous injection to beef cattle, nonlactating dairy cattle and calves, including preruminating (veal) calves.
A single dosage of 9 milligrams of MAXIM-200 per pound of body weight administered intramuscularly or subcutaneously is recommended in the treatment of the following conditions: 1) bacterial pneumonia caused by Pasteurella spp. (shipping fever) in calves and yearlings, where re-treatment is impractical due to husbandry conditions, such as cattle on range, or where their repeated restraint is inadvisable; 2) infectious bovine keratoconjunctivitis (pinkeye) caused by Moraxella bovis.
MAXIM-200 can also be administered by intravenous, subcutaneous or intramuscular injection at a level of 3 to 5 milligrams of oxytetracycline per pound of body weight per day. In the treatment of severe foot-rot and advanced cases of other indicated diseases, dosage level of 5 milligrams per pound of body weight per day is recommended. Treatment should be continued 24 to 48 hours following remission of disease signs; however, not to exceed a total of four consecutive days. Consult your veterinarian if improvement is not noted within 24 to 48 hours of the beginning of treatment.