It cannot be assumed that cattle withdrawal times can be applied to sheep and goats.
When extrapolating pharmacokinetic data between species, one should be aware that (1) this is not necessary a linear process; (2) target tolerances or MRLs may vary across species and (3) clinical outcomes can vary. For these reasons, estimation of a withdrawal interval of a drug across species should be approached with extreme caution and the veterinarian should consult with FARAD. Below are examples of suboptimal clinical outcomes:
Age can also be a factor in the elimination of drugs.