One of my dogs years ago would drag in a whole giant brush pile, plus some decent logs. He was always trying to do what I was doing. I mean he just got it into his head one day to drag in a stout deadfall branch, after watching me do it, then he went nuts with it, kept me in campfire wood at my camp.
That's the same dog went up the cliff and banzaied off into the water, after watching me and some local kids do it. This was like 40 feet, my limit on how far I want to do that (or that I ever have).
Same dog, same camp, decides he needs a den, so he, over around a week or so, excavates out this *huge* under an old stump den cave. So, one weekend, my bud comes over to my camp and both our girlfriends..this big storm comes up, it is tearing the tent up, so I said, "quick, down into Blue's cave"! We all fit! Four people plus one large dog, we all sat out that storm down there.