I think my birds have coryza and more unexplained deaths.. I just dont no!

[rookachu]

2 Weeks ago I had 71 birds.. 4 ducks, 16 Guineas, 3 white leghorns, 3 old English game hens, 5 RIR's, 4 old English bantam games, 15 bared rock, and 16 white rocks and 5 bbr bantams... Ive lost the 4 RIR's, 1 game bantam, to what I believe is coryza.. And all my bared rock and white rocks to an unexplained over nite catastrophe they where all a month old and started dying this mornin with no previous symptoms.. They were healthy as can be yesterday but this mornin nearly the whole baby coop was dead.. I do not know what to do.. I keep the water in all coops cleaned and changed twice a day always have food availible change the bedding once a week and still somehow this happens.... I dont understand it.. Every bird that shows symtoms of coryza I cull and that kills me because you get so attached to these sweet little critters.. I feel horible like this is all my fault and I cant figure out how to stop it.. My Guineas and ducks are UN affected.. Im so lost any consultation or help is much appriciated because I have run to my wits end and have no idea what to do.. the coryza was in my older birds coop that are around a year and a half old and the young ones in a different part of the farm are the ones that started dying this mornin without worning..

 

[CMV]

Unless you followed very strict biosecurity methods it is possible that your whole flock or flocks are infected. You need to have the next bird that dies necropsied and have the whole living flock(s) tested. If you have one of the CRDs present you are going to need to make some hard decisions.

I am sorry.