I'd look into fermented food. There is a wonderful thread in the meat birds section. I have all my birds on it, I think it's great. It will do everything yogurt does and more. Speaking of yogurt, yogurt is not yogurt. You need to get balkin? yogurt if you want it to do any good. That sugary Danone stuff is garbage and probably worse for your birds then nothing at all. It has to have the live cultures in it.
Honestly, from your description of the place it doesn't sound that bad. Of course, you saw it and I did not.
Honestly, from your description of the place it doesn't sound that bad. Of course, you saw it and I did not.