Your best bet and the best solution would be to heat each unit individually with heat pads on the floor. Either heat tape, "human" heat pads, etc. These can be run through a rheostat and even a thermostat if you wanted, makes heating even more simple.
Building two seperate cages is probably your best bet. I once built a cage that had two sperate units and it is a b!tch to move (4 x 4 x 2; 2 units @ 4 x 2 x 2 each), especially while using melamine. That stuff gets really heavy when all put together. Next cages I build will be 4 x 2 x 1 melamine to save on
|