You'll get a mixed bag of answers but I've seen mine eating it and they are all fine.Got 3 eggs today!!!
(And snow)
Also, saw my little Frannie girl with a mouthful of Sweet PDZ... I poured a bunch down after I stirred up the shavings. Usually they then mix it in scratching around. I looked down and she was shoveling it in. I screeched and shooed her. She went right over to the waterer.
Anyone else have a chicken eat Sweet PDZ?