That's amazing your girl lived to be 4 years old! I would hope some of my favorites lived to 3, but not knowing how their parents were, I am very doubtful.
I guess I would rather a rat with the "shorn" locus over the "fuzzy". The fuzzy's are said to have the kidney failure and short lives.
Of course I really wouldnt know how to tell the difference between them, except the shorn are 'supposed' to have less hair on their face or something... I dont know.