Get some sinkin pellets, like the ones mentioned above, especially the Hikari sinkin carnivour pellets. ALSO get some Mysis shirmp...they are great and fish love them. Next, get a container, fill it half way with water. Put the bloodworms, any pellets, and mysis shrimp in it together. Allow them to completely thaw together. Then feed it. Start out with more bloodworms in the ratio of foods, and gradually cut back on the amount of bloodworms until you are no longer adding them to the mix. The smell of the bloodworms will be on the food, so the pike will be more open to eating them. It should work. Do it over the period of a week or a week and a half.