Hehe, it looks like someone took a chunk out of Blackavar's ear. Poor thing.

The cage should be fine as long as your girls aren't on the small side.
I've kept my larger males in a ferret cage before, and they didn't have a problem with it.
Two of my girls are on the smaller side, and could get through 1" spacings fairly easy...
Just keep a close eye on them when they first move it, I'm sure they'll be alright.