There are several reasons why a dog may not seem to listen to their owner. Here are a few possible causes:

1. Lack of training: Dogs, like any other animal, need to be trained in order to understand and obey commands. If a dog has not received proper training, they may not understand what is being asked of them or may not have the necessary skills to follow through on a command.
2. Lack of consistency: In order for a dog to learn and follow commands, it is important to be consistent in the way you give commands and the way you reward or reinforce good behavior. If a dog receives mixed signals or inconsistent rewards, they may become confused and may not respond to commands as expected.
3. Distractions: Dogs, like humans, can be easily distracted by their environment. If a dog is focused on something else, such as a squirrel or another dog, they may not be paying attention to their owner and may not respond to commands.
4. Medical issues: In some cases, a dog’s inability to follow commands may be due to a medical issue, such as hearing loss or cognitive decline.
5. Lack of motivation: Dogs are more likely to follow commands if they are motivated to do so. If a dog does not see a reward or does not find the task being asked of them rewarding, they may be less likely to follow through on a command.

To improve a dog’s ability to listen to commands, it is important to provide proper training and reinforcement, be consistent in your approach, eliminate distractions, address any medical issues, and find ways to motivate the dog to follow through on commands. If you are having difficulty training your dog or if they are experiencing behavioral issues, it may be helpful to seek the assistance of a professional dog trainer or a veterinarian.