Your cats wear very small collars and the device which is about the size of a smoke detector is mounted near the dog door.
Anti cat dog door.
Switch to a doggie door made with heavier material than just a soft plastic.
Consider your largest pet when you select a door.
Collar activated pet doors are designed to stop unwanted visitors from entering your house for instance neighborhood cats or wildlife.
Cat gates allow you to restrict access within your home and establish boundaries for your cats.
Most collar activated pet doors are very sturdy and secure.
Cats will push through a plastic flap easily but they might not like pushing through a heavier door in order to get through.
If you have multiple pets and some are allowed to go in and out of the house freely but others aren t a collar activated pet door is ideal.
Measure the widest part of your pet chest or hips add 1 inch.
Compatible with all microchips worldwide.
We recommend using a dogwatch indoor boundary.
Cat doors are available for window wall or door installation and come in a variety of sizes and styles.
Measure your pet from the top of the shoulders to the bottom of the chest or belly whichever is greater add 1 inch.
Pet gates come in a variety of sizes and styles from wire mesh adjustable panels to gates equipped with pressure mounts for no hardware.
This effectively keeps the cats from using the dog door.
I work for freedom pet pass the link above and some dogwatch dealers resell our pet doors.