HollowOfWisps
Previously AstroDuck
This has been my experience as well with laying hens. Mine not only laid better, but their molts when more smoothly and their feathers just looked so much better when I upped their protein. I also noticed that with hatching I had seemingly healthier ducklings and less hatching issues.I don't know any recipes, but from my research the ideal amount is 16-20%. Bear in mind, laying females could benefit from a slightly higher protein. For boys, perhaps a lower amount would be okay, but I have girls so I use 19% protein
If they aren't getting enough, you'll usually see signs they're craving it, such as feather eating