Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose and treat chylothorax in cats [title] Notice breathing problems. [step] The first symptom of chylothorax is usually difficulty breathing. Often, it seems like the cat is holding their breath or has stopped breathing because it takes longer to inhale and exhale.

Ending1: This is called holding their breath (" angina "). When you watch, look for changes in the cat's breathing. Ending2: The cat's breathing is labored, as there is a lot of pressure to force to inhale and exhale, or it will have very hot or cold breath, due to heat. [substeps] The cat may start gasping or drawing air through its mouth. Ending3: If this is the case, your cat may have chylothorax. [substeps] When inhaling and exhaling, count a series of diaphragm breaths, or, on an inhale, draw air in and exhale. Ending4: This may also present as shortness of breath, panting and rapid breathing, or wheezing and other sounds while breathing. [substeps] The cat may also be unable to exercise because of the breathing problems.

Answer format: ending1/ending2/ending3/ending4