His left eye is black, not sure if you can see in the picture. What could it be ? It was fine this morning and then I saw it turned black and still that way
Nothing really looks out of the ordinary to me. If his colors changed it could simply be because he was cold. They tend to darken when cold, or when they are trying to absorb heat.
I see where the area around the left eye is darker but I agree it doesn't look concerning. It doesn't look wounded, just naturally changed darker as mentioned or perhaps a shed is coming on which can mess with their coloring for a while.
It doesn't look too bad, maybe a bit off perhaps. It may just be getting ready for an upcoming
shed. I don't think it's anything to worry about though.