Reviving a defunct thread. My family has recently acquired a dehydrator, Lord knows what for, but I immediately thought of using it for fish feed. If one were to dehydrate a mixture containing raw fish, would that give it a shelf life comparable to commercial dry foods? Last time I made some fish food I used some bell pepper, garlic, heart, calamari, krill, spinach/kale, and a couple of other things. Some lean fish, for example.
Perhaps the fish could be avoided altogether, and calamari/prawns used as to minimize the amount of fat. Or even rely solely on beef heart, this is never going to be the main course, merely something to toss in now and again or when the culture needs a break. So beef heart + all the veggies...