I have a bad feeling about this. If there were bite marks on them I assure you that would have been reported.
I'm not sure, it seems to me that Canadian LE can be quite tight-lipped about ongoing investigations and only release details either once a case is solved or once they hit a dead-end and become convinced that a case is unsolvable without the public's help and even then they only release what they deem "pertinent" which I find odd because how the heck can they know what is pertinent and what isn't if the case is stalled? In this they are similar to British cops.
On a different note, I wonder if the body parts could have come from just about anywhere in the Pacific Northwest and not necessarily from Vancouver Island itself? I know an expert said he thought they have had to be from the island but in order to assess this he had to have guessed where the feet had started their sea journey, and could have been way off. Hopefully they are also looking into missing persons from Washington state and Oregon.
Another possibility is that the feet belonged to would-be illegal immigrants to either the US or Canada. Vancouver BC is the largest seaport on the Pacific coast of the Americas, it has a huge container terminal and it's not unreasonable to think many smuggled immigrants transit through it. Immigrants who die during the journey are sometimes removed from containers and thrown overboard before entering Canadian or US waters. I imagine it's possible that three such cadavers got sucked into prop wash and minced. However there is a problem with this theory: very few Asians wear size 12 shoes.