Two-thirds of dogs, including chihuahuas, have wolf DNA, U.S. scientists say

Czechoslovakian and Saarloos wolfdogs had the most wolf DNA, with up to 40 percent. For breeds used as pets, the most “wolfy” ...

Thousands of genomes reveal the wild wolf genes in most dogs’ DNA

Dogs evolved from gray wolves, but scientists debate exactly where, when and how many times dogs were domesticated. Ancient DNA evidence suggests that domestication happened twice, in eastern and ...