Because viral shedding can occur a few days before clinical signs appear, it can be helpful to test very high - risk puppies, such as littermates of
a clinically ill animal or puppies from a known high - risk location, even if they are showing no overt signs of infection.
Tick - borne Lyme disease is still a threat to human and
animal wellness, and though 15 percent of dogs test positive for Lyme disease on a screening test, only 10 percent become
clinically ill.