https://ift.tt/2wwdHAe Lassie Got Help, Would Your Dog? Animal Behavior, Dogs, Animal Cognition Dogs with an opportunity to free a distressed owner turned in a mixed performance. JAMES GORMAN https://ift.tt/2AmEMaU July 31, 2018 at 05:30AM

By JAMES GORMAN from NYT Science https://ift.tt/2AmCrwE