To prevent your dog from picking up things on walks, you can start by teaching a strong 'leave it' command. Begin by holding a treat in your hand and saying 'leave it.' When your dog looks away from the treat, reward them with a different treat. Practice this until they reliably respond to the command. You can also use a head collar or a basket muzzle to physically prevent your dog from picking things up. Keeping your dog engaged with toys or treats during walks can also help distract them from picking up items. Additionally, work on impulse control exercises at home to strengthen their self-control. Always supervise your dog closely during walks to intervene if they try to pick something up.

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Topics covered in this question:

Dog Behavior Dog Training Leave It Command Dog Walking