I have a cage just like that for my ferret too.
A few recommendations though... (hope ya don't mind... I'm speaking from experience)
1. That drop-off from the top is really too high.. it'd be best to have another level thing there instead of the hammock. They're very clumsy animals, lol...
2. Water bottle - TOO small. You should invest in one of those water crocks that screw into the side of the cage (works well with that cage too, I have one) It only cost about $5 - I found it in the bunny section at Petsmart. Provides more water and it's easier for them to drink. I had a HUGE waterbottle in there at first but he rarely used it... he uses this crock a lot.
3. Be careful about having the ratties under him... ferrets are predators, rats are prey. At least that's how it works in their eyes. I wouldn't dream of letting my rats and ferret that close to one another myself.. hehe... I do keep them in the same room though, and when my ferret runs up to the rat cage, they run up to sniff him.. don't seem scared, I dunno. Just promise you'll be extra careful, that's all.
Anyways.. that's my advice.
He's a BEAUTIFUL ferret! I LOVE Mitts!!!! Incredibly handsome...!
Mine is a chocolate sable.
