I quite frankly do not know what a dew worm is. :? But, if they are raised at a farm or something similar as fish bait, I wouldn't feed them. There is too much risk of them carrying a disease or something unpleasant it could pass on.
ok, thank you Lizardgirl. I know there is a fellow in town that sells them to various stores, so I will check him out first before I even think of giving them to Spike. Oh, and Dew worms seem to be just regular worms....hmmmmm.