You can't find any slugs? Last time I was in B.C. There were slugs everywhere. I think they would probably be most likely to take slugs. Worms are good to. Do you have any bait shops near you? Pick up a pack of good old nightcrawlers. I wouldn't bother with fish and I can almost guarantee you that they wont touch pinkies initially. Get them feeding reliably on something and then start to incorporate the pinks. Any part should be safe to use.

I wish you good luck in raising the little fellows. What kind of colours did you get? Post some pictures if you get a chance. I would love to see them!