That's interesting! I feed Mazuri, too, except to one duck who is on a veterinarian prescribed diet to reduce reproductive activity. She eats a lot of scratch. Her poop is remarkably stinkier!I changed from flock Raiser to Mazuri starter. The poo smell is better on the Mazuri. I have to have the feed store order it but any feed store that sells Purina could probably get it. I also use puppy pee pads so I can through the poo away and put mine out at 4 to 5 weeks on pine shavings.
Another plus for Mazuri!