Do you give him enough food, and constantly? A good diet is always essential for a pitbull. It also might be just a bad habit. Learn to command him to stop doing it.

Then again, it might be because its just itchy. Check out its toe and bring it to a vet if necessary.

Cool stuff. Thanks for the tips, I’ll do that too!

You should take note of his neuro-psychology. Look at how he behaves according to the environment and happenings. If he reacts to a certain person, get the person away. If its the sun, keep him indoors.

You can also force him to stay calm by locking or crating him up.