Man’s best friend may be more like man than we realized.
Dogs, like humans, have ducts that produce tears to keep their eyes clean and healthy. But tears in dogs hadn’t been linked with emotion before this study.
To investigate the link, researchers measured the number of tears among 18 dogs with a standard test. It involved a paper strip placed inside the eyelids of the dogs for a minute before and after they were reunited with their owners after 5-7 hours of separation. They did the same test when dogs were reintroduced to people they knew, but the number of tears only increased during reunions with their owners.Copyright 2022 CNN Newsource. All rights reserved.
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