Official Loofah Tester
Join Date: Dec 2009
Location: SE United States
Hi Shayna and Liam. Welcome aboard.
The 1 inch spacing is fine for large male rats. Basically, anything they can fit their heads through, they can escape. I have a couple of large 650/700 gram boys in a 1 inch bar space cage and they do fine. I even like it because I can slip my hand through far enough to give them scritches without opening the door.
However my 350 gram juvenile boy who can slip through the bars fairly easily.
Your width and depth on the cage is overkill huge (18 x 30 is the usual minimum I've seen people recommend), but the 18 inch height? I don't know what the minimum recommended height is for a rat cage, but my instincts say it might be a bit low ceilinged for them if they're healthy ratties, since ratties love to climb. If if were my cage, I'd save it for a hospital or geriatric cage when climbing is not something to be encouraged. But I'm also practical, and if one of our more experienced members thinks is minimally doable, then hey, I'm all for making do with what you have.
If you did want to use the cage immediately for the ratties, then you could invest in some hardware cloth, wire snippers, and plastic zip ties and wrap the cage to refit it with the 1/2 inch spacing.
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Last edited by Storyseeker; 12-23-2010 at 11:07 PM.