duck is gasping. How to help?

[BlueO]

Hello everyone and happy Sunday! So I have a 5 month old call hen and about three days ago she started gasping for air. I’ve had this happen before and usually I just give some vetRx and it clears up over night but this has been going on for three days now. And just last night I noticed one of the ducks living with her gasping a bit. Dose anyone have any idea what this could be and how to treat it? I’m keeping her and her flock separate from mine but I really don’t want this passing to my big flock. Any help would be greatly appreciated! Thanks!

 

[BlueO]

Anyone?

 

[BlueO]

So this morning they are the same. It’s not getting any better but not any worse. The vetRx is clearly not helping and I have no idea what to do or what to treat them with. Help would be very appreciated!