Most of my Doe cages are 30X30 w/outside feeder and an extender added. All cages have an automatic watering system.
NOTE: You will see that all of the cages have electrical conduit ran through the top on the front.
This easy, economical practice prevents sagging along the front edges of the cages.
It gives a much neater appearance as well as maintaining the integrity of the cage from being warped out of square.
They are bound to the cages with industrial strength zip-ties.
I do have some 36X30's that hold special litters or replacements for the herd. All of my buck cages are 24X30.
The auxiliary water bottles allow an extra water source so the youngsters won't have to wait to get a drink.
Here's a shot of my main breeding room. 35 doe cages and 7 buck cages. Again, the extra water bottles are for does with litters.
My watering system is gravity fed from two water barrels. (one for each room). They are pressurized with a submersible pump that keeps water flowing through the system all of the time. During the winter, the water barrel cabinet is heated to 95-100 degrees. The water doesn't freeze.
Grumpy.