A tennis ball can mean a lot of things in a dog’s world. It can turn a backyard into a training ground or a bonding session. Fetch taps into more than just energy levels. It is tied to instinct, focus ...
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Mikel Delgado, Purdue University and Judith Stella, Purdue University (THE ...
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