Before you start training your cat or dog, make sure you have chosen the right cat doors for your pet. The pet door should be the appropriate size for your pet, easy to use, and installed at the right height.
Start by introducing your dog to the pet door without actually using it. Allow your pet to sniff and investigate the door, rewarding them with treats for positive behavior. This will help your dog to get comfortable with the dog doors.
Positive reinforcement is key to training your pet to use a pet door. Every time your pet successfully uses the pet door, reward them with treats and praise. Positive reinforcement will help your pet associate the pet door with positive experiences and encourage them to use it more frequently.