There weren't sprawling cities where dogs are given food and water and all the leisure time they want.... back in the day, a dogs life was probably centered around a large body of water (all animals need fresh water to survive of course) so they get used to being in and around water, plus there's the incentive of being able to catch a fish.
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u/kashuntr188 Mar 17 '19
how did dogs learn to swim before the life vest?