I have known a lot of smart critters, but to stay on topic, there was Lefty, a very large mackenzie husky who belonged ,heart and soul,to my girlfriend, and liv

I have known a lot of smart critters, but to stay on topic, there was Lefty, a very large mackenzie husky who belonged ,heart and soul,to my girlfriend, and lived in terror of bumping into things and/or clearing off a table if he should wag his tail, lefty and I were strangers, except when in or near the water, and he would swim and dive with me, and on one particular day he began wading out into a small river and picking up rocks from the bottom and carrying the ashore, which he placed in two disticnct compact piles, one for large rocks, the size of his head, and another pile 20' away for small rocks he could hold completly in his mouth, the is whole procedure was spontainious, and went on for over an hour till he had two good sized neat piles, one of only large rocks carried precariously, and the other of small rocks gotten somewhat easier, but still his head was under water while getting all of them. There was another large dog in the household and we had a strict no leash, no tied dogs, no collar policy and for the most part they ate what we ate, and were generaly on there own recognisence, and so on the occasion of lefty's rock piling project, it was given due respect and we waited till he was done and he never did it again, and didn't have toys, or balls,play stick, or anything else, and was otherwise giant,reserved,quiet,except near water or in large open spaces around water.