Appropriate Blood Collection Age and Size

Animals must be > 6 weeks of age AND > 15 grams for blood collection. This is due to the fact that animals need to be at least 6 weeks of age to appropriately develop antibodies to exposed pathogens; in addition, at least 25µg of blood is needed for dried blood spot technology. Alternatively, PCR test on environmental swabs, tissues, or feces can be performed.