The fish flavor is true. One should not exceed 10% by weight of a bird's daily ration, or eggs will taste fishy. Every now and again we get one that does, as someone gets a chance to be a bogart.

Fat is very different than protein, and I've had trouble, especially in winter, if they get too much. It will give them diarrhea, not good in winter!

So they get the fish or very lean meat every day in a measured amount, and the fat is reserved sparingly for winter when they need extra energy.