I have 3 hens that have gotten infected by canker:
1. An amerucana naked neck hybrid that looks like an amerucana probably weighs around 3 pounds. This one has two yellow thingys on boths sides of its mouth.
2. A silkie that weighed around 2 pounds last time I checked. This one has one small yellow lump forming on one side.
3. Another amerucana naked neck hybrid that looks like a naked neck probably weighs around 3 pounds. This one basically has like a dot of yellow forming on one side.
I've been putting Apple Cider vinegar in the water they all drink out of.
However, since they recently got it the infection is fairly small. Anyways I've been doing some research on how to treat it and found several ways.
Thyme apparently works like metronidazole? I recently ordered some thyme extract from amazon and I was wondering if anyone has used it on their chickens before? My father also gave me the idea of dabbing a swab with hyrdogen peroxide on their mouths however I know that is for external use only not internal use but it does kill infections. I have metronidazole but they are 500 mg tablets that I got from a doctor last year. They expire in October.
Do you guys have any advice for what I should try?
I've had a hen die from it before I don't want it to happen again! 

(Also there aren't really any vets around here that treat chickens. If there are it's probably expensive)
Source
http://www.poultrydvm.com/condition/canker
1. An amerucana naked neck hybrid that looks like an amerucana probably weighs around 3 pounds. This one has two yellow thingys on boths sides of its mouth.
2. A silkie that weighed around 2 pounds last time I checked. This one has one small yellow lump forming on one side.
3. Another amerucana naked neck hybrid that looks like a naked neck probably weighs around 3 pounds. This one basically has like a dot of yellow forming on one side.
I've been putting Apple Cider vinegar in the water they all drink out of.
However, since they recently got it the infection is fairly small. Anyways I've been doing some research on how to treat it and found several ways.
Thyme apparently works like metronidazole? I recently ordered some thyme extract from amazon and I was wondering if anyone has used it on their chickens before? My father also gave me the idea of dabbing a swab with hyrdogen peroxide on their mouths however I know that is for external use only not internal use but it does kill infections. I have metronidazole but they are 500 mg tablets that I got from a doctor last year. They expire in October.
Do you guys have any advice for what I should try?



(Also there aren't really any vets around here that treat chickens. If there are it's probably expensive)
Source
http://www.poultrydvm.com/condition/canker