I have read, but not followed up on, that they have been able to make a good salmonid food that does not rely on wild-caught fish. I know that Doc Donaldson, at the UW, used to use the carcasses from the returning salmon as the protein basis of the food fed his salmon and trout. There are enough meat byproducts out there that could be used.

Again, it becomes a cost. Do we spend actual money or do we let the earth absorb the cost?