Pork, I have to agree with others here...feeders really do not supply a good nutrition for Os. Pellets are great....try some frozen (thawed) shrimp, scallops, some smelt, beefheart, zuccinni, peas all supply good nutrition for them and they love em! Yes, it is fun to watch your O chase and catch the feeders I agree just be sure to do it only like once every couple weeks. Remember varied diet and clean water is best to fight off Hole in the head and help keep your O healthy and a healthy fish is a happy fish!