http://www.wolfcountry.net/information/WolfPub.shtml:
"Most wolf pups are born with blue eyes, which gradually change to a yellow-gold color by eight to sixteen weeks, though sometimes their eyes can change color much later. Occasionally, a mature wolf will be found with
blue eyes."
http://www.ksu.edu/biology/pob/genetics/:
"Wolves are sometimes observed to have black coats and
blue eyes."
As for these quotes: it was published on US websites so we can assume that they speak about their local subspecies of wolves since there are no black european wolves nor did I find publications about wolves in Europe with blue eyes.
I didn't find any photo of SWD with blue eyes on Internet (there are not many photos at all on the net) but I saw already such in reality. However I wasn't interested about it. Next time I take a photo
