My only concern is quality of the dog food. Many brands have questionable ingredients (including Pedigree, sorry) even though they have great marketing to entice the public to buy it. Even Science Diet which sounds like it should be good and is touted as "the best for your dog" or Beniful (aghh!! the stuff is awful!) are marginal at best. Those dirty rats...
. If we are going to eat the eggs from our hens or their meat then I wouldn't let them eat much of the dog or cat food unless its a known good quality of food (no by products which can be from down, dead, dying animals or even euthanised family pets). I am not in favor of our dogs and cats eating it either but that's my choice--and at least we don't eat our dogs (yuck--horrible thought!) and it therefore doesn't effect our diet or our children's. I feed all my fur babies a non grain quality diet called EVO. They also have a diet with some grains called INNOVA by the same company and all their diets are made in the USA with USA ingredients in their own USA inspected plant. Not saying you have to change your dog's diet as its a personal decision but if the hens eat it then we are too. OK, I can get carried away with my soapbox but all that recalled food for China and films of the DDD animals put in our pet food hits me hard.
So my opinion of the hens eating it is not to--unless its a better food.