You can be mauled by a police dog and if you hit the dog, you get an assault on a police officer charge. It's bad enough a cop can permanently disable you if you can't follow 3 conflicting orders being yelled, but they can also send an animal who literally doesn't know better.
Well the courts said they need probable cause for a search, so they needed an on-demand probable cause generator, or else they wouldn't be able to do pretextual searches on "randomly" stopped minorities anymore, which would be a violation of they(the police)'re civil rights.
The best thing is that the dog's actions are taken seriously from a judicial standpoint, yet the dog obviously can't be held responsible, so if there's wrongful action, no one is ever at fault!