So i recently got a exotic nutrition wheel for my rats and it has a sandy track to wear down their nails. the instructions say not to leave the sandy track on too long because it can hurt the animal if they’re nails are worn down too much. However, my rats don’t run in their wheel really? they more enjoy just walking on it at leisurely pace or rocking back in forth in it. in addition the never use it more than a few minutes at a time. i was wondering if it was okay to leave the sandy track in since i think the direction was aimed more at people who own animals who consistently run on the wheel.