I tried searching all over but couldn't find anything describing this. I'm worried they might be cracks or micro cracks and bacteria that grew around them. I'm a first time hen owner and my chickens just started laying. I found some of these on concrete and it seems like they are cracked, they...
I'm not sure how much yeast, I was told to just kind of sprinkle it on until their food is covered. I do that when I notice their food is low (I always try to keep the bowl full, sorry if that's not good to do). I give them each about 750mg of niacin a day mixed with sweet peas.