Mine go nuts for it, especially my hens. It seems to really help with the laying. I can tell you that we used dry cat and dog food as a staple for almost all our carnivorous species when I was wildlife rehabillitator. We fed other things too but the dry food was a staple base of the diet for almost every critter except our raptors. Somestimes you just can't argue with what the ducks are telling you...they would be eating small fish, crawdads and lots of insects in the wild, so the dry cat food is likely what we have available that is closest to what they would naturally seek, other than live fish or having them in a pond. I'm glad you said this as I've harbored the same idea for awhile. I've noticed my girls CRAVE the stuff when they are laying. I've read the ingredients in some of the dog and cat food out there & it is GOOD stuff. My maturing Pekins were giving me a really hard time this a.m. as I haven't been giving them any cat/dog food for a day or so. I caved in and fed them a sml bowl of IAMS cat food. They gobbled that up SOOOO fast and settled right down to their usual racketing about selves.