I have one pike and two jd's living together in a 40 gallon breeder tank. They all seem to get along well together. No one fish is the domanant at this point. They are all rather young fish. JD's are about 14 months old and the pike is slightly younger. The bigger jd "male" is about 5 inches long and the female is about half the size. My question is since I put the pike in about 6 months ago the jd's won't eat live food. Before i added the pike they would. They do eat cichlid flakes. Fish have plenty of room with little or no quarrels. I don't know what to do.