Jd's in my exsperience grow pretty good untill around the 5-6 inch mark and drop to a slow growth rate after that. People that you c with 10 inch plus jd's it took along time to get them to that size. I am with every one else in saying do not over feed to beef up your fish. All that will do is kill him in the end destroying his insides. I fed my 8 inch female jd hikari cichlid gold, omega one cichlid, and omega one shrimp pellets with great results. hikari in the morning, omega one after work, and a few shrimp pellets every night for a snack before bed, and 2 times a week i would feed either earth warms, super worms, frozen krill, or frozen blood warms, allso vegie pellets a couple times a week probaully not needed but just what i did for her. I do not feed any of my fish on sunday. One day a week down time sunday is the day i picked. There are so many good pellets on the market these are the one that work for me and that are in my budget. If you have a higher budget the new cichlid bio gold is top shelf, and so is the ching mix mad for flower horns but still perfect for large cichlids. I have used the ching mix it is a great product for beefing up and vibrant colors but at 2-3 times the price of cichlid gold is out of my price range. If you have the money im sure that the ching mix and hikari bio gold are the two best product you can use for best results with out over feeding. There are tons of these threads on here about feeding jd's and every other large cichlid type it in the search bar and u will get tons of results. I see that you have been a member sence 09 so you are well aware of how to operate this site lol. Hope this helped a little. If you have any quistions for me about what i did to beef up and max out my female j.d feel free to send me a pm