Yes, my first try with yogurt didn't work as I put nothing in it and they just tromped through it. This was when they were young, maybe 3 weeks. Then I added their feed and they recognized that and went for it. Since then I have served it to them plain or mixed with other things (today hemp seed and chick scratch).
I love the fact that they calmly eat it off each other's face. The first time I saw one of the lower on the totem pole chicks eat it off the current bully roos face I was horrified and thought she would get a real whooping but no. As well, it is the one treat that everyone seems to be able to share peacefully without fighting for space or pushing someone out.
I buy the plain low fat type, not sure if there one type is better than another. I would serve it every day but I think I read once a week. Anyone have any info on that??