How do you get your English bull terrier to walk with his harness on he just sits as soon goes outside and will not move but no problem without it on?

There are a few reasons why your English bull terrier might be sitting down and refusing to move when you put his harness on.

1. The harness is uncomfortable. Make sure the harness is properly fitted and that it doesn't rub or pinch your dog anywhere. If the harness is too tight, your dog may find it difficult to breathe or move around. If it's too loose, your dog may be able to slip out of it.

2. Your dog is not used to wearing a harness. Some dogs simply need time to get used to the feeling of wearing a harness. If this is the case, try putting the harness on your dog for short periods of time at first, and gradually increase the amount of time he wears it as he becomes more comfortable with it.

3. Your dog is associating the harness with something negative. For example, if you only put the harness on your dog when you take him to the vet, he may start to associate the harness with pain or stress. Try to make wearing the harness a positive experience for your dog by putting it on him before fun activities, such as walks or playtime.

4. Your dog is trying to get your attention. If you give your dog attention or treats every time he sits down when you put his harness on, he may start to do this intentionally in order to get your attention. Try to ignore your dog when he sits down, and only give him attention or treats when he is standing up and walking with his harness on.

Here are a few tips to help you get your English bull terrier to walk with his harness on:

1. Make sure the harness is comfortable and properly fitted.

2. Gradually acclimate your dog to wearing the harness.

3. Make wearing the harness a positive experience for your dog.

4. Ignore your dog when he sits down, and only give him attention or treats when he is standing up and walking with his harness on.

5. Start with short walks, gradually increase the length of the walks. Take note of how far he can go before sitting down. Once you notice he is beginning to sit down, use treats to change the direction and motivate him to keep walking in the desired direction

6. Use positive reinforcement methods, like treats or enthusiastic praise, to reward him for wearing his harness and taking walks.

If you are still having trouble getting your dog to walk with his harness on, you may want to consult with a professional dog trainer.