Sounds like a rare condition. This is Sooty,one of the red squirrels that came to visit us in our holiday cottage in Rothiemurchus in the Cairngorm National Park,Scotland.
I was amused by his various antics,and he was particularly fond of monkey nuts,which he’d take from the lawn,and then bury not 10 yards away in the forest floor.The lovely Dorothy Thompson has a shot of another Scottish squirrel from the posh end of the country here in which she has a grey squirrel with a slightly red face also with a monkey nut.And here is Sooty, a red squirrel with a grey face..it’s a strange world.
Sony Alpha 350 DSLR Tamron 70-300 zoom at 300mm
Animal Captions & Confessions Oct 2011
British Wildlife-UK Dec 2011
Squirrels,Chipmunks and Relatives July 2012