Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to treat a dog sneezing blood [title] Keep your dog calm. [step] If your dog is actively bleeding it may be upset or agitated by that. Focus on keeping the dog calm by petting it and reassuring it if you can.

Ending1: This will help its mental state, as well as keeping its blood pressure down and thus limiting the amount of bleeding. [substeps] However, do not give it any medication to keep it calm unless you discuss that option with a veterinarian before you do. Ending2: Petting helps a dog to feel safe and relaxed and it therefore can stop the bleeding. [substeps] If the dog becomes aggressive, you should try to keep the dog calm. Ending3: Do not yell at it and shake it. Just try to soothe the dog slightly and gently move it out of the way when it is fighting. Ending4: If you get alarmed your dog may lash out, which will only cause a scratch and can even lead to injury if you don't restrain it. Remain calm while you clean the wound and avoid overexerting the dog.

Answer format: ending1/ending2/ending3/ending4