Ok, I got a dilemma .... The two feed stores here, sell Pigeon Grit but no longer selling Chicken Grit. I could probably order from Amazon but hate to put it on my Mail Carrier. I do keep my girls (4) confined for their safety, feed them Flock Raiser fermented ... I would like to give them some treats (scratch or dry feed) down the road. They'll be 12wks old next week so been getting Chick Grit which the feed stores & Walmart carries but no Chicken Grit ... Would Pigeon Grit be ok or just keep them on Chick Grit?