Genetic tests are of value only in a research setting. (marinmagazine.com)
Even in a research settings where scientists weigh and measure every scrap of food people eat — they're still estimating to a certain extent. (completehumanperformance.com)
There are tests which can detect cat distemper in feces and urine, but these are expensive tests and are usually performed in research settings and not in a vet's office. (cat-health-guide.org)