The activity in a project that would disqualify an animal from USDA category C is surgery.
Protocols involving clinical research on client owned animals having non-research related surgery may fall under the heading of category C. Using superficial blood vessels, one can administer injections, draw blood, or implant catheters.
Other than this, breeding animals that will be subjected to genotyping processes or euthanized for whatever reason (for example euthanizing retired breeders). Studies incorporating clinical indicators were not found to involve anything more than minor discomfort or pain. Using superficial blood vessels, one can administer injections, draw blood, or implant catheters.
Animals that are being raised, trained, or kept but not yet utilized for teaching, testing, experiments, research, or surgery are included in the USDA category B and not C. Thus, having surgery as an activity in a project would disqualify the animal.
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