Ok!The pic was taken on notebook paper (this was in the days of 'sucky' pic taking skills).
Tried again under lower lighting:
It must be noted, that I have had only this one abnormality in the rat collection. At this time, I was using a variety of cat flea and tick products on the bedding. I have stopped that practice.
I have had only one abnormality in the ASF's so far (one born without a tail). It was subsequently fed off (sorry I didn't take pics).