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Old 02-07-2013, 01:15 PM
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Sailboat Sailboat is offline
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I think it's gotta be instinctive. I agree they like the interaction and the bitework, of course, but I do think that in pre-living-with-humans packs they would tug on pieces of prey as Der Trihs suggests.

Think about it -- it's useful to be able to divide up the food, especially since dogs share food altruisitcally, and it helps make swallow-able chunks as well. But dogs don't have cutting boards or vises -- nothing to hold the chunk in place while they saw with their teeth and pull...except another dog on the other end. So it's a useful behavior to share a tug with a pack mate, and most useful behaviors get modeled in play because play is how they are learned.

So I speculate that dogs thought tug-of-war was fun even before they merged their destinies with humans.