Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to clean gunk from your dog's eyes [title] Visit your vet. [step] If your dog has gunk or discharge draining from her eyes, you first need to make sure it's not a sign of a serious health problem. Make an appointment with your veterinarian to determine the cause of the discharge before addressing the problem on your own.

Ending1: [substeps] You can make a appointment with your veterinarian either by calling your local animal shelter and asking for advice on how to care for your dog and avoid potentially dangerous contact with gunk. [title] Open a clean dog shampoo bottle. Ending2: Your vet can then give you a prescription. [substeps] Get a prescription for antibiotic sprays and dish soap and follow their directions for proper application. Ending3: While you should evaluate your dog for symptoms, you should never rely on your own assessment of the problem. [substeps] Take notes on your dog's symptoms and bring them with you to the vet visit. Ending4: [substeps] If you visit your veterinarian, you may have them run blood tests on a bag and for eye fluids to measure. [title] Use tweezers to test for gunk.

Answer format: ending1/ending2/ending3/ending4