sites that sell frozen items have to ensure that its still frozen on arrival, therefore there will be additional costs. i personally find it much cheaper to buy locally.
I would also recommend Pro-salt's 100% pro-V-veggie, Nori, and angel formula.
If it's not already eating try a fresh clam on the half shell. Buy a live clam but freeze it first. Thaw, rip open, and feed.
HIH
S