Yes, the pork, and type of fish meal they used, is what made them so much better. Without stirring up a fuss, most of the feeds now tend to be vegetable based protein (soy, corn, wheat, etc.) Chickens actually benefit from occasional animal protein, especially during molt. Once in awhile, I give mine canned Mackerel, or canned cat food. If you have a piece of leftover meat, toss it in the food processor, and toss it out to the chickens. This especially helps during molt. No, bugs don't always seem to be quite enough animal protein for them.