Don't let your dog not fight: A dog running away from police was shot and killed (after $17,000 attempt to save her life) after police were called to the scene of a dog fight in New York. Two dogs had gotten into a fight and the owner of one of the dogs was bitten while trying to separate the two. The third dog was not involved in the fight but was the one who was shot in the back, while trying to flee police after cops shot at the dogs at least five times. Officers than hid the still alive dog in the back of a vehicle without telling the guardians. They rushed her to the vet, spending $17,000 to try and save the dog's life. Unfortunately she died. Here's a petition. Police flat out lied.
Don't fight over electricity: In Horry County, a dispute over electricity could lead to your dog being fatally shot. A flat-coated retriever guilty of nipping at heels is now dead thanks to Horry County police. Link
Don't scratch anyone: A dog who ran at an officer was shot. The dog was running loose and scratched a child. When he ran at/near/in the vicinity of a police officer, the natural course of action was to shoot the dog. Link
Don't let your dogs fight and expect normal attempts at separating said dogs: Last year, a Champaign, Illinois police officer responded to the scene of a dog fight. The two dogs - a leashed Labrador Retriever and an unleashed dog described as a Pit Bull, were engaged in a fight. Both dogs would not stop fighting. Witnesses report that at no time did any human feel as if they were in danger from either dog. Despite this, the officer discharged his weapon shooting at the dogs seven times. He killed the Labrador Retriever, grazed the Pit Bulls, and embedded a bullet in an apartment complex. He was suspended for a day. Link
Don't steal food: Memphis police shot a mixed breed dog for essentially stealing a lunch. The dog had escaped from his backyard, stole someone's lunch, maybe nipped someone, and then was shot when he "charged" (read: ran towards/near/by/around) an officer. The dog was not instantly killed and instead dragged himself into his own backyard, dying from blood loss because apparently the officer didn't bother to think to take the dog to a vet. Police are investigating themselves so I'm sure it will turn out great. Link
Don't have a porch where your dog can emerge from: Winning the epic war against an ounce of marijuana, police arrested a dude, then shot his dog. Link
Don't expect police officers to hustle your mortally wounded dog off to the vet: The Humane Society of Grand Bahama is a little miffed with the way officers handled a dog they had shot. The dog, a Pit Bull, was shot in the head and remained alive when they were called. Authorities refused to permit HSGB staff to take the dog...finally, when the dog had a seizure, shelter staff essentially stole the dog to provide treatment. She did not make it. The officers were not charged with anything other than making a "bad" judgment call in not allowing medical treatment. Link