We have just come out of an unprecedented cold snap. My flock came through the low temps relatively unscathed. My main rooster has a dark edge on its right wattle. I believe the dark edge to be evidence of a slight case of frostbite. Here is a couple of pictures. Is my diagnosis of frostbite correct? Thank you for your analysis.
![IMG_2568[1].jpg IMG_2568[1].jpg](https://www.backyardchickens.com/data/attachments/1233/1233583-68c51fdf41aa30880596b9a0e4f745ef.jpg)
![IMG_2573[1].jpg IMG_2573[1].jpg](https://www.backyardchickens.com/data/attachments/1233/1233594-9b1f7c605800128d3c29c2fc4843edbc.jpg)