WASHINGTON (AP) – The Supreme Court on Wednesday considered curbing police use of drug-sniffing dogs as lawyers argued that using a dog’s hypersensitive nose outside a home to indicate the possibility of illegal substances inside amounts to an unconstitutional breach of privacy.

Justices also are considering making states prove in court how well-trained and effective those drug-sniffing dogs are before prosecutors can use evidence turned up by the dog — something police departments say could put a crimp in their use of canines in law enforcement. It “puts the dog on trial,” said lawyer Gregory Garre, who represented the state of Florida in both cases.