About 2 months ago, one of my Buff Orpingtons comb & wattles started getting darker. It's almost purple when the rest of the flock is their normal rosy red. Obviously she wasn't choking, or had a blocked away, so I thought a respiratory infection. I gave her a round of antibiotics about 6 weeks ago and nothing changed. I noticed when dosing her that the inside of her mouth is sort of the same purple color. She acts, eats, and drinks normally. The picture shows her on the right and a healthy chicken on the left. Nothing else appears to be wrong with her. She lays down and is a little slower than the others, but that's because she's had something minor wrong with her gait since she was born. She was the runt and didn’t form 100% correctly. I also treated for anything I could think of to cover all basis. Any clue what could be causing this.
