I've got two electronic rodent repellents. I use to have only one, but it failed two years ago. I discovered that it wasn't working when the rodents chewed through the wiring for the brakes and lights. That cost me $1100 to repair. Now I keep one working inside and one in the front compartment. It doesn't really seem to bother the squirrels that hang out in the trees above the RV but I don't seem to have the problems with them getting inside. I don't think the cats would appreciate being locked in the trailer all week. They would probably do more damage than the rodents.