Seeking help from people I trust.
I have been extremely fortunate and lost very few birds up this way. The tide seems to have changed. The 7 year old roo I can attribute to age, but I lost a pigeon yesterday and today I found a bantam dead in the coop. They are not under weight, not indication of being egg bound. The mate of the pigeon that died seems to have a hitch in his breathing.
I picked up Duramycin-10 and Oxytetracycline.
Any help would be greatly appreciated.

I am so sorry!
Are there any other symptoms?
If Oregon does not have a free necropsy service, you might want to do what you can--I would open them up to see if there are any worms, tumors, fungus or etc. inside the intestines. Check out the lungs, crop and etc.