Do brindles have any special health problems? I kept one of the brindles from that grey doe, and she was fine, had a healthy litter of 7, and then a couple months later she started getting real thin, and lethargic, and a month later she died in my hand (it was very traumatic!). But she was in with two other does, and to this day those does, both older than her, are absolutely fine and healthy. Was it some genetic condition she was predisposed to? Why did it affect her and not the other mice?