so you have a total of 75 rats?


I run 1.8,6 tubs per, no nursing racks,over 20 racks currently
I also have smaller racks 1.4, 6 tubs, over 30 racks still in use.

I have always understood the idea of nursing racks and rotation and its great for small scale stuff. But if you figure the space your are taking up with a nursing rack plus the loss of litter potential with the cool down times, plus the man hours involved. It doesn't make sense on a large scale unless you are aiming to offer larger rats quicker. I only offer pink to small sizes.

I have tried it, doesn't pan out for my application needs.