Very curious! How did you take this image?
I... Used my scanner.
Hahaha awesome! That is what I was thinking. I did some pictures a long time ago with a scanner and the ripples looked similar. Nice work keeping your pet so still!, were they eating a treat?
My ferret are realy quiet, they already are 5 years olds!
In another comment the artist mentions that they used honey 
...it would appear as though your ferret was trying to scan it's butt in two of the pictures.
