Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose and treat aural polyps in cats [title] Watch your cat's movement. [step] Paying attention to how your cat moves can help you determine if it has aural polyps. Cats with aural polyps might have trouble walking in a straight line.

Ending1: They may also seem to have a bat-like gait. [title] Think about how old your cat is. Ending2: They might also tilt their head to one side or another. [substeps] If you notice this behavior in your cat, take it to the vet immediately. Ending3: You can usually tell if your cat is simply simply using one paw to move; the cat might not have aural polyps on it at all. [substeps] There are other ways to check for aural polyps. Ending4: Observing your cat moving can help you better identify any possible aural polyps. [substeps] Your cat may begin to make loud or whistling noises when it moves.

Answer format: ending1/ending2/ending3/ending4