Hi folks. I read that some advise that the bottom of the J-feeder should be placed 4 inches above cage floor. However, I am concerned that the kits may struggle to reach it initially. What is the experience of RT members? I just built 8 cages that have the slot cut 4 inches above the floor but my older original cages have the J-feeders 2 inches above the floor. These new cages do not yet have bunnies.