Substitution for a generic VFD is allowed if it is not specifically stated on the VFD that it is NOT allowed.

• A. False
• B. It is never allowed
• C. True
• D. Only for human-grade diets

Answer: (C)

Substitution is allowed when working under a VFD as long as the substitution remains within the scope of what the VFD permits and there is no explicit prohibition on substitution. The key idea is that the VFD authorizes use of a medicated feed under the veterinarian’s supervision, and if the form does not state that substitutions are not allowed, you may substitute a generic product that has the same active ingredient, the same dosage, and the same withdrawal and label directions. The veterinarian’s oversight and the product’s label requirements must still be followed, and you should ensure the substituted product aligns with the VFD’s terms. If a VFD explicitly forbids substitution, then no replacement is permitted; otherwise, the default is that substitution is allowed.