Does BHA publish Screening Limits?
No, BHA publishes Detection Times. These, are used by Veterinary Surgeons to advise a Withdrawal Time. Screening Limits are instructions to laboratories which set a level above which medications are reported, in recognition that minuscule amount of medication have no effect. Screening Limits are both of little use to Veterinary Surgeons but more importantly publication would show the confidential assessments on integrity risks made by BHA.