...or white patch on their throat or white blaze on their chest...is a question I get from time to time.
The answer is it varies greatly. Some have no white, some just a white chin, Some have all three, white chin, throat & chest spot.
Here's Nittany Lion's catch today. I took this picture to show the variation of the white chin/white patch(es)...
It's been a long time since I was trapping and when I did it wasn't in PA but in western NYS. My brother and I caught mink on a regular basis for years and right now I don't remember them having white chins and throats like those in that photo.
I have to correct myself on this statement. In 1960 I had a mink stole made for my mother for her birthday from the hides of 18 mink that I had caught. In the finished product the top row of pelts retained the heads. My mother is long gone but I just phoned my sister in NYS who still has this thing all these years later. I asked her if those pelts had white chins and she said they do. So much for my memory from 58 years ago.