Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose coughing in dogs [title] Notice what time of day the coughing occurs. [step] Coughing in dogs has many causes, including heart disease. The cough is a symptom and can't always be used to determine the cause; however, certain conditions do have distinctive types of cough, which can help point towards the source of the problem.

Ending1: [substeps] Sneezing, patting your dog's head, and pulling on their fur can all prompt the dog to cough. Coughing is caused by bacteria, and viral infections can cause coughs. Ending2: [substeps] Coughing is the kind of cough that occurs between 20 am and 4:30 pm. Dogs with aspergillosis should be kept awake to know the exact due date of gerd. Ending3: Noticing what time of day your dog coughs can help determine the cough's cause. [substeps] Coughing during the night can be caused by congestive heart failure, fluid buildup in the lungs, or tracheal collapse. Ending4: With this in mind, keep track of times of day when you notice the coughing in dogs. [substeps] If you notice a cat constantly coughing, take it to the vet.

Answer format: ending1/ending2/ending3/ending4