Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to treat a cat with blood in its stool [title] Talk to your veterinarian asap. [step] As soon as you notice blood in your cat's stool, make a call to your vet. Tell them what you saw in your cat's litterbox and ask them to make you an appointment.

Ending1: The vet may have some information you may not have. [substeps] Be thorough when making appointments, as emergency patients cannot provide the information on their cell phones. Ending2: Explain what did you see and why you suspect blood. Try to be as flexible as possible when dealing with your cat. Ending3: The vet will run tests and put the stool sample into a lab. [substeps] In addition to making appointments, your vet will likely ask for your advice on preparing your cat's stool. Ending4: Most vets will take these symptoms very seriously and will try to get you in very quickly. Ask them for any advice as to how to care for your cat in the meantime.

Answer format: ending1/ending2/ending3/ending4