Had one chick die this morning and two more late this afternoon. Another is sick and noticed it had bloody poop, so I got on here and figured out what the problem is. I am heading out in the morning to get some medication for them. I hope it isn't too late. I have a couple questions, and I sure would appreciate some info. I am planning to switch over to medicated feed. Should I wait until after I treat the birds with Corid/Sulmet before giving them the feed? Also, I have a large flock of chickens that are around 4 to 5 months old. Should I treat them also? And should I switch them over to medicated feed? None of them have been sick so I'm hoping their immunity is good, but what is the best thing I should do for them? I am also going to get some Probios to give them. I found a post where someone advised giving the antibiotic for 7 days and the probiotic for 14 days every other day. One more question: I have some hatchery birds coming in the mail this week. They will be kept in a brooder for awhile, of course, but what do you suggest I do for them besides start them on medicated feed? Thank you for any help you can give!