This is a trick question. The canoe rolling downhill has nothing to do with the true question. It is meant as a distraction. The true question asks how many pancakes does it take to cover the dog house?
One needs to find the average surface area for a pancake. Whether buttermilk or water was used should not matter. Although, one could argue that having a fluffy pancake could add more to the surface area, the deliciousness of it is assumed. Then one needs to find the average surface area for a doghouse. 1 + 1 = 2.
Given that the answer presented was 4, the doghouse must be very small. Or someone does not know how to make pancakes and made very large ones. Assuming someone is competent enough to make average sized pancakes, then the amount needed to cover a doghouse now depends on the type of dog the owner has. The doghouse must be big enough to be able to provide shelter for the dog when it has fully grown.
Finally, stating the obvious that the ice cream does not have bones is another distraction technique meant to confuse you, the seeker of truth to finding the true answer.