Dandruff on head?

[hamsterdance]

Hello!
Tonight I noticed that both of my rabbits have dandruff on their heads. Haven't noticed it elsewhere, they are currently up to date on revolution... Any idea what it could be? Treatment?
Thanks

 

[hamsterdance]

Also to add, they are both currently deep in molt. But both rabbits heads at the roots of their hair are pretty flaky.

 

[hamsterdance]

Sorry to keep adding stuff but I looked again and the dandruff is only in a penny sized area on both of them exactly where I put the revolution... Could it have dried their skin out? If so are there any things I can put on it to make the dandruff go away?

 

[hamsterdance]

If anyone has any idea, I still haven't figured out! Thanks