Eeww....
Okay some tricks I've learned about stinky smells...
One, put strong cologn or vicks vaport on the tiup of your nose, renew regularly for ability not to gag.
I've also stuffed cotton up my nose and did mouth breething through a medical mask for real stinko stuff. Not a photo op but a gag necessity....
Are your birds sprayed? I hope not!
Tomato juice really helps to shampoo a dog.
It might help if there are areas of your barns/outbuildings sprayed.
THere is a product caleld Ozone, I believe used in hospitals, maybe ozium that really kills smell on a long term basis as well...don't know if it's safe around poultry.
Best wishes..............oh my.