I see some bubbles in the eye too. Along with a sunken appearance.
These could indicate respiratory disease like Mycoplasma, but without testing, it would be hard to know.
If you wish to test, contact your
State Lab or go through an independent lab like
Zoologix.
If you quarantined them away from your flock, you could return them or cull - this
might limit exposure to your existing flock and hopefully avoid the spread of disease if you've practiced good biosecurity between the newbies and your existing flock.
But, it sounds like you want to treat the hens? If so, then you can try either monitoring them to see if symptoms worsen, then begin treating with an antibiotic like Tylosin.
Keep in mind antibiotics may treat
symptoms and the birds will often "get better" but IF you are dealing with something like Mycoplasma, they will be carriers for life and very likely your existing flock may become ill when you introduce them. In turn, all birds would then be considered carriers.
I'm sorry you're having to deal with this, it's a tough place to be in for sure.
There's risk when you bring in new birds no matter the source, some less risky than others, but there's risk.
Here's some reading about poultry diseases:
https://edis.ifas.ufl.edu/publication/ps044