white spots?

[hazel and luna]

today I separated my two female hamsters. my hamster hazel was too stressed to be with Luna as she didn't like sharing and was tense around Luna (who apparently loves to share and doesn't care if hazel squeaks).

I had noticed white patches appearing on hazels coat, I wasn't sure what it was but I assumed it was stress so I separated them. hazel seems quiet content now I'm just worried about Luna as she was desperately searching for her sister and eventually gave up and now wont come out of her tube (they kept on getting into tiffs but it was mostly luna invading hazels space however its unfair for me to keep them together if its stressing hazel out so...).

literally in a matter of hours Luna has now formed these same white patches on her coat....

now I don't know this being a possibility but they have a very pale colour for a Campbell I'm just wondering if this could mean that they are hybrids or could it be down to stress. if so what should I do