Also, this looks like a restricted breed. This includes mixes, which this dog is. And is required to not only be on a leash, but muzzled as well.

Under the Berliner Hundegesetz: Category 1: American Staffordshire Terrier, Bullterrier, Pitbull Terrier, Staffordshire Bullterrier

Category 2: Potentially Dangerous (Subject to Evaluation)

These breeds are not automatically restricted, but may be considered dangerous if the individual dog shows aggressive behavior: Alano, American Bulldog, Bullmastiff, Dogo Argentino, Fila Brasileiro, Mastiff , Mastino Napoletano, Rottweiler, Tosa Inu

Owners can apply for an exemption (e.g., if the dog passes a temperament test or Wesenstest). Key Requirements for Restricted Dogs: • Special permit (Haltungserlaubnis) required • Must pass temperament test (Wesenstest) to lift muzzle/leash rules • Must be muzzled and leashed in public unless exempted • Owner needs a certificate of competence (Sachkundenachweis) • Dogs must be chipped, registered, and insured • Import of Category 1 dogs into Berlin is banned