Chihuahuas have about 0.2 percent wolf ancestry, according to a new study. While that chihuahua might seem about as similar to a wolf as a shrub is to a mighty redwood tree, some small breeds like the ...
When scientists compared the DNA of thousands of dogs and wolves, they found the two species were not as separate as once thought. Nearly every dog, from Chihuahuas to huskies, carries traces of wolf ...
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