I have just installed a kitty door in my laundry room that allows me to keep the cat litter and food in the garage so they don't stink up the house. The problem is both of my cats are afraid of the kitty door. I have "very gently" shown them how it works by holding the flap open and putting my hand through; I've tried easing them through it, but they freak out. I have also tried to tempt them with food to go through it. Not sure if anyone has any advise on how to train the cats to use the kitty door (they are 1.5 and 2 years old - both indoor/outdoor cats)