We can go back and re-examine. In the work that was done in the early 1990s, we looked at impacts and ways it could be controlled. One of them was the delivery of ivermectin, which is a worm control agent that was delivered to seals. The technique worked fairly well as far as cleaning up worms out of the seals goes, but the problem was the delivery mechanism--trying to make sure you gave it to a seal in a safe manner for the person who was doing it and also in a safe manner for the seal.
On November 9th, 2006. See this statement in context.