X2, especially if they are starlings .http://www.dph.illinois.gov/topics-...nditions/west-nile-virus/dead-bird-collection@BirdLeaf If you are finding dead wild birds all over your property, I highly recommend that you contact CSU as discussed in your other thread https://www.backyardchickens.com/threads/hen-with-skin-issue.1219030/page-2#post-19491766
Give them a call, they may actually come to you to collect the dead birds on your property and might be able to take some mucous swabs from your birds while they are there.
I'm very sorry your girls are not getting better. You mention they may not be leaving the roosts to eat/drink?
