Bloody necks?-all of my albinos have this blood stain on their neck fur. I don't see a source and it doesn't seem to be bothering them, but should I be worried?

It's just a porphyrin stain bean! My baby girl has the same stain ^-^

I think it's just porphyrin, we've had a bunch of females that were all white and had the same stains

I'm pretty sure it's porphyrin one of my ed white rats used to have the same thing and was lazy about cleaning it so I'd wipe her with a wet washcloth every now and then

Maybe its from them cleaning the Chromodacryorrhea?