I have 8 chicks, ages 3-4 weeks. I noticed some really runny poo. It's not bloody or discolored, just way more loose than the other poops around. I have no idea which one it came from. Should I be worried? Should I make efforts to try to figure out who did it or just be on the lookout for more? Also, I gave them a few crickets and mealworms yesterday. I have no idea if they've ever had anything like that before. Could something new like that cause a little diarrhea? Is it a good idea to put the apple cider vinegar in their water as a preventative measure, or only if someone's actually sick? Also, I've changed their pine litter and added pine litter in the last 24 hours, and they're still really stinky...kinda yeasty smelling. Plenty of circulation. No top on the brooder boxes. Is this normal? I read somewhere that the litter should be changed in the brooder box every other day and litter added on the off days. I can't imagine that that will work in this case. Sorry for the million questions. I've mothered dogs, cats, goats, and rabbits from birth, but never any chickens.