you need to focus on getting them off of live food and on frozen tilapia or frozen silversides, because they are probably currently eating live feeder fish. my silver was purchased at about 7 inches. he was already on pellets, besides, silvers will eat anything. they're not that picky, in my experience. they are pigs and agressive eaters. my 2 gar were on live minnows when i purchased them at 6 inches. i weaned them onto frozen silversides since silverside resembled the live minnows that they were already eating. it took time but it worked. be patient, because florida gar are picky and not very aggressive eaters. i have yet to get my gar to take pellet. they totally ignore pellet. the best bang for your buck would be feeding frozen tilapia. i go to my local grocer to purchase frozen tilapia by the box for $13 and that's for a 4 lb box, which includes 22 fillets. also, tilapia is a high-quality, reasonably-priced source of protein. once you get your fish settled in and they start to regularly take food, try a variety of things. i've never tried shrimp, because i think it can be expensive. also, try freeze-dried krill. my fish love krill and their not too expensive. i also use night crawlers as an occasional treat. good luck, be patient and keep in mind that you're training your fish to eat a you wish and that should be to your financial advantage.