Not only these dogs live long, they retain juvenile traits for most of their lifetime. (notinthedoghouse.com)
Turning a wolf into a dog involved a number of changes, both morphological and behavioral, many of which are linked to a phenomenon common in domesticated animals known as paedomorphosis — or the retention of juvenile traits in the adult form. (pbs.org)
It would also explain why so many domesticated animals exhibit «neoteny»: They retain juvenile traits as adults. (science.sciencemag.org)