The point of the yogurt is to give them some good gut flora. They do not digest milk very well so you give only a small amount, maybe 1 tsp per grown chicken. It does not matter what brand -- but store brands that I have seen do not have live cultures in them, so there would be no point. The label will state it, if live cultures are present.
Lazy J, you beat me to it on the corn. Here is a thread that is quite informative on this:
https://www.backyardchickens.com/forum/viewtopic.php?id=74876
Lazy J, you beat me to it on the corn. Here is a thread that is quite informative on this:
https://www.backyardchickens.com/forum/viewtopic.php?id=74876