My ducklings are weird, ones 71g and the other one is 31g. They are at most 2 days apart. I went to the vet and they just dismissed my concerns and gave my parents a fat 79$ bill. Theyre also sneezing alot and I do believe they're breathing quite heavily (their tail is moving whilst breathing) and there was mold in their brooder ( i did a deep clean out tho, I didn't see it cuz it was in a corner that I can't see if I'm just staring at it normally. I'll clean brooder every day from now on tho) I wish the vet was some help but cuz they said it was nothing I don't think I'll be able to convince my parents into getting a second opinion. (Not to mention the vet took at most 5mins looking at them, they asked the questions all to my dad which spends max 10 mins with them per day whilst I spend most of the day with them (I'm on school holidays) and even then she asked what they ate and my dad said chicken starter, she didn't even mention them needing nutritional yeast (my mum bought the yeast so my dad didnt know about it) do y'all think it's any worry? (Plz tell me about the weights. That's my main concern cuz she's half the size aswell) They're 9 days old approx and they're call ducks. Am I just worrying over nothing?