Ancient wolves may have self-domesticated by staying near humans for food scraps, gradually evolving into early dogs.

Here’s a look at the puppy and adult versions of 14 dog breeds that literally look nothing alike from puppyhood to adulthood.

Her team checked which genes showed the strongest correlation with increased body condition index, the dog equivalent of BMI, in 241 Labrador Retrievers. They identified the DENN1B as a key ...