Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to care for a sick dog [title] Monitor your dog's daily activity. [step] Keep a notebook of when your dog relieves himself, when his symptoms occur, when he eats and drinks, and so on. This helps to establish a pattern to the symptoms.

Ending1: [substeps] No matter the severity, it should only make sense that first thing in the morning, it's time for keeping your dog (and other persons) occupied. If you have three puppies in the house, it's your responsibility to train and protect all the puppies you have at home, over time. Ending2: It can also be a very useful tool for the veterinarian to diagnose your dog's illness. [substeps] If your dog is mildly sick (not eating the best for a day, restless, vomiting once or twice, a bout of diarrhea) you can carefully observe your dog at home and phone your vet for advice. Ending3: [substeps] Keep a notebook of what your dog eats, how often he drinks, when he goes to the bathroom, where his bowels are, how often he urinates, and so on. This will help you to tell when he is active enough to pee and when to poop. Ending4: The numbers don't have to be constant--keep a record of your dog's diet and exercise. Compare the ingredients in his diet, but be consistent--you want to make sure that there isn't one drug or supplement that can cause the symptoms or give the dog a bad-tasting drink instead of an adequate dose.

Answer format: ending1/ending2/ending3/ending4