| Drugs | |
| Antibiotics, present at less than 2,000 grams per ton (total) of commercial feed | Grams per ton of commercial feed (g/ton) |
| Antibiotics, present at 2,000 or more grams per ton (total) of commercial feed | Grams per pound of commercial feed (g/lb) |
| Note: The term "milligrams per pound" (mg/lb) may be used for drugs or antibiotics in those cases where a dosage is given in "milligrams" in the feeding directions. | |