Sibling testing works largely the same for animals as it does for humans. Genetic testing has long been used to determine a variety of factors in dogs, cats, and livestock. In siblingship testing, an individual's DNA is used to prove or disprove his or her relatedness to a particular individual. Whether you’re a professional breeder or simply need more information about a dog you’re considering adopting from your local shelter, paternity testing can provide the accurate results you need.