Tug-of-war
Two dogs grasp different parts of an object and vigorously compete for it.
(Goodman et al. 2002; Capra, 2011)

The Belgian Malinois puppy competes for the leash with his playmate, a Border Collie.
VIDEO
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The female Czech Wolf Dog approaches the male Golden Retriever. The male is lying on the ground and chewing on a stick. The male stares at the bitch; when she grabs the stick, he spreads his forelegs wide open. She then begins the tug-of-war, competing for the piece of wood. The male gets up, keeping his grip on the stick; the female changes her hold on the stick and begins to tug, capturing the stick.
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