Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep an indoor cat active [title] Schedule playtime. [step] Your cat should be able to have at least ten to fifteen minutes of exercise each day. Playing with your cat will not only ensure that they get the proper exercise but it will help socialize them as well.

Ending1: Its possible that your cat will become bored with play later, or that these playtimes are outings for other cats. If you plan to live with a blind cat, make sure to choose one that is able to sit up and walk throughout the day. Ending2: [substeps] Make sure your cat can play for an extended amount of time even at night. There are different types of indoor play playtimes for different breeds. Ending3: Schedule playing sessions for cats that have aggression issues or that have crohn's disease. [substeps] Check with your vet or veterinarian for the length and intensity of playtime sessions. Ending4: It is important for you to interact with your cat as indoor cats do not have as many opportunities to socialize with other animals and people. [substeps] Older cats will be harder to entertain for a long time so consider breaking up the play time throughout the day.

Answer format: ending1/ending2/ending3/ending4