yes , they are no problem at all. mine are 36" off the ground to the floors. I have mine so the stool falls through to the ground.
I didn't realize how much difference it made till I had to put my old dog on the ground because he is 16 yrs old and he is no longer stable enough to walk on the floor rails. with him on the ground I have to put repellant on him so the flies don't eat his ears up. the dogs in the pens have no flies bothering them at all.