Sneezing Silkie

[BayFillyZ]

I have a 4 year old silkie hen with a chronic sneeze which has been going on for about a year and a half. No other symptoms and no other birds have this condition. Until 2 months ago, her nostrils were completely clogged so I decided to try to do something unclog. I delicately dug them out with a tooth pick. (thankfully she tends to stay really relaxed through this procedure) I managed to get it completely clear but her nasal passages were still mostly closed. The gunk which was packed into her nostrils was like a yellowish crumble. I don't know if that was feed she'd snorted or dried puss. behind that matter was black thrush like in a horse's hoof (you don't mistake that smell). after cleaning completely out i treated with vet rx and i was able to get some tiny droplets of diluted oxine into the nostrils. Her sneezing and breathing did improve but didn't go away. Fastforward to today, she is sneezing again about every 8 secs today. I cleaned out nostrils again today. Same yellowish crumbly matter but no signs of thrush.

My question: what is causing the sneeze and is there anything i can do to stop it and open up those sinuses?

 

[Eggcessive]

This seems to be a problem I have read about on here from time to time. Many believe it is food blacking the nasal passages, and the blockage or the cleaning out would stimulate sneezing. Perhaps trying pellet feed would help. There is also a disease called canker that can cause nasal lesions and lesions around the beak and inside the throat which can block the airway. Treatment of canker is Metronidazole or Fish Zole 250 mg daily by mouth for 5 days. Once a month, acidified copper sulfate can be used in the water to prevent it from recurring. Here are some links with pictures to read:
http://www.ebay.com/itm/Fish-Fish-Zole-Metronidazole-250mg-30-Count-/121073772925
http://www.thepoultrysite.com/diseaseinfo/154/trichomoniasis-canker-frounce
https://www.backyardchickens.com/t/286126/weird-undiagnosed-chicken
https://www.backyardchickens.com/t/259661/chicken-has-blocked-nostril-what-should-i-do
https://www.backyardchickens.com/t/686508/will-bactrim-treat-canker-in-young-chick
http://www.jefferspet.com/acidified-copper-sulfate/camid/liv/cp/AB-A1/

 

[BayFillyZ]

Thanks, Eggcesive, Canker is one possibility i hadnt thought of however i see no visible lesions but perhaps its in her throat.
For the last few days i have dabbed i drop of vet rx inside the roof of her mouth (beak) with a qtip and instantly her breathing improves. putting it on the outside wasnt as helpful. but unfortunately the affects are temporary and her sneezing returns a few hours later.