21/08/2024
Black eyed whites (BEW) and masks are a bit of a mysterious gene that’s popped up in the last couple years with a few ratteries. Despite not being common, the BEW gene is not actually new!
A breeder in Wellington had a couple BEW pop up in their litters back in 2012(ish), but were assumed to be a lost gene when the remaining BEW passed away. However, many many years later it came back - this time with the addition of masked rats.
BEW’s are not to be confused with buff, or minks & doves who haven’t moulted yet. BEW and masks have pure white fur (as white as an albino) with pitch black eyes.
The masks can be as dark as graphite or as pale as a small shadow. The marking typically only covers their head, but sometimes they have spots on their back. More often than not, they’ll fade to white before they’re a year old.
An interesting fact is that the masked ones aren’t necessarily black, nor are they always hooded!
We had an agouti hooded mask, who looked identical (colour wise) to any other masked rat. So it was a surprise when she produced agouti babies (as the dad of the litter was black).
Breeding rats with this gene can be troublesome and devastating. Unlike overseas where BEWs don’t appear to have any issues as newborns, the ones here are not so lucky. When BEWs are born, some come out a noticeably different colour - kind of a pale anaemic colour. The pale ones often struggle to keep up with their littermates, and are often a lot smaller. Because of that, it's not uncommon for them to pass.
The ones that do make it, typically catch up once on solids and have the same health as any other kind of rat.
At Interstellar rattery, we’ve had 7 litters so far with BEW or masked rats in them, and we’ve seen a noticeable improvement in their start to life. Our litter here we had 5 incredibly healthy masked rats, which was such a pleasant surprise.
So hopefully as we continue to breed rats with this gene, we will be able to understand it more and continue to improve the overall health of the gene.
1. Newborn babies, and you can see the wee BEW has a noticeably different skin tone
2. Baby Glitter, showing off her extra cute mask
3. Another example of a BEW who is a couple days old, next to his PEW sister
4. Masked boys Glaceon & Goblin
5. The adorable Hopper, who is fluffy and Masked. Although his mask faded pretty quick!
6. Echo, the only BEW we (interstellar rattery) have every produced.