Cause for concern?

[Eggcessive]

Here is a thread with excellent pictures of canker, and a link to read about the disease: https://www.backyardchickens.com/t/27193/whats-wrong-with-this-chicken
http://www.thepoultrysite.com/diseaseinfo/154/trichomoniasis-canker-frounce

 

[dawg53]

That looks like canker to me. Return her to where she came from. Canker can be treated, but it infects the whole flock. It is a chronic disease spread through birds using the same waterers. You don't want that in your flock.

x2