I recently bought 3 ducklings from my local tractor supply. They are now 3 weeks old. They've started to get bigger but recently one has been getting tired more often and he is now smaller than the other two. He like to keep one eye closed a lot but he will still open it and use his eye sometimes. He also seems to have trouble breathing sometimes.. it just sounds like he is wheezing. I always make sure they have water and feed 24/7 and they are in a lareg enough area to choose to be under their heat lamp of not. I have started to let them play in warm water once a day so I know that they are able to clean their noses if they need to. I haven't separeted them yet because the other two ducklings get upset if he is away from them for more than a few minutes. I just want to make sure my baby Olive (Yes his name is olive!) is going to be okay. And I would like to try to stay away from going to the vet if possible. I'm a college student so money is a tad tight! lol. Thanks for the help in advance!!