I’m really scared that my 6 week old ducks have sour crop. Their breath does smell foul, their excretions are runny, they don’t seem to have the appetite they once had, and their chests are squishy. I feed them a chick starter food and I think I over feed them veggies (without enough grit). I started to notice the smell last night and that was definitely the start because I spend hours with these ducks every day. I’ve read things about giving them monistat, apple cider vinegar, garlic water, and yogurt. Please help me help them.