At least one of my hens has been having rust colored loose poo. I switched them to feeder/grower a few weeks ago, but same brand as they had before, so not sure that's the issue. After doing some research, I'm thinking it may be ecoli. I read to treat with probiotics. I have a really good powder probiotic that I give to my Great Dane everyday, which has all the good bacteria in it. Would it be safe to try on my chickens? Also, if not, how much yogurt can/should I give them? Is it still safe to eat the eggs?