Hey, I have several dominique chickens that are a little over 5 months old, and one of them has diarrhea. I gave them chick probiotics when they were babies because the same thing happened. I bought 3 packs ( 0.17 ounces each) of probiotics. You use 1 pack with 1 gallon of water, and it has to be changed daily, so I have enough for 3 days. To prevent this from happening again, do I need to give them probiotics once a month?