Season 2 Episode 3 - suspect with machete and a blow torch, 3 dogs are killed in the house fire. The bodies are blurred out when cops are walking through house after fire is put out.
A dog is shot in the eye by a suspect and cries out for quite a while. It is pretty heartbreaking. Luckily, the dog is saved and retires from the force. He loses an eye, but he is a happy dog who is well-loved by the officer who was his partner. At 17 minutes, you're in the clear.