Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to tell if your older dog is over exerting itself [title] Look for excessive panting and trouble breathing. [step] If your dog is getting winded more easily than it used to then you may need to exercise it less. Problems breathing, coughing or hacking, or lots of panting can be a sign that your older dog is doing too much.

Ending1: [substeps] Coughing and hacking, especially difficulty breathing, are some common signs that there is a problem with your older dog's joints. See your vet or veterinary expert for the best guidance if you suspect your older dog is over exercising too much. Ending2: [substeps] If you are currently giving your dog the silent treatment, see if it is panting less than usual. If it is not, you should take it to a vet. Ending3: [substeps] Mucus buildup, nasal secretions, poor hygiene, breathing difficulties, sickness, injury or illness, and coughing are all things that need to be taken attention attention. Too much breathing can create infections in the respiratory tract. Ending4: Allow the dog to catch its breath and calm down. After the dog has recovered you may be able to continue the activity at a slower pace.

Answer format: ending1/ending2/ending3/ending4