Mine just got some Nutrena All Flock in yesterday. I snagged up the bags before they run out again.
If it's your only option, go for it. P.S. Your birds will poop increasingly more on the Dumor feed.
I buy 3-4 bags since they're 40lbs a bag, & the feed bin holds 120lbs of feed. Plus I mix in layer pellets in for the ladies.
You're welcome. My feed store hasn't had Nutrena All Flock in 3 months.