We got three new chicks on Saturday, five weeks old. The smallest, a Spalsh Cochin, sounds like she might have some respiratory issues going on. She has been sneezing occasionally but this evening I noticed it sounds like she is wheezing. She seems fine, doesn't act sick, is plenty active and extremely vocal. She is pooping. We have her in wood shavings. Should I be concerned about this? I know how quickly babies can decline and if we lost this one my daughter would be devastated. I don't think they have had any vaccines. We got them from a breeder who has lots of chickens. Should I get some kind of vaccine for them anyway for general protection? We are keeping the babies separate from our grown hen. Thanks for your help.