If you are concerned about security when looking at a small dog door for your cat. You can always look into using a infrared dog door for peice of mind. Just make sure the door is not too heavy for your cat to push through.
Small Dog For Adoption The love and devotion that these small dogs will give you in return for the care that you will lavish on these dogs will make you happy that you decided to choose a small dog for your lifelong compan...... Similar Editorial : Best Dog For Family | Source : Do Dogs Get Cold