That is not complete and balanced. I am curious as to what the stool looks like on that, I consider fish to be boneless as the bones are so fine. If you are feeding raw, you need to be doing the 80% meat/10% bone/10% organ to be balanced. Cucumber and PB is not doing anything nutritionally. The organs are so important, that is where the vitamins come from. And yes a fish is technically whole prey, but not for raw feeding purposes, can't rely on them to be your only source of organ and bone. I feed by oz and not grams, so am not sure what the grams breaks out to, but I don't think mackerel fish are that big so it seems like not enough food volume wise either.