Hi. I hope I’m worrying for nothing but we brought home two ducklings a week ago, approx 6 & 9 weeks old now. They both are acting, eating and pooping fine but the younger one sounds like she has a very slight stuffy nose when she’s at rest (I can see straight through so don’t think there’s any food stuck and they have plenty of fresh water to dunk their heads and clean their nares). I have 250mg cephalexin capsules. If this progresses is it safe to give this to her and at what milligram? I’d have to weigh her for accuracy but I’m thinking she’s a pound, maybe.