Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to keep your dog comfortable indoors [title] Provide a comfortable dog bed. [step] Keep your dog cozy indoors with a great dog bed suited for its particular needs. If your dog is shorthaired and often shivers, get it a cave-like bed with a fluffy overhang.

Ending1: You can also add these beds to your house as well, depending on your dog's specific needs. [substeps] If your dog enjoys having its beds cozy, place them in areas of your home that are less likely to be exposed to the elements. Ending2: If your longhaired dog is prone to getting hot, use a cot-style bed without any fluff. [substeps] Consider getting an orthopedic memory foam bed for your older dog with joint problems. Ending3: Whichever bed you choose, make sure it is big enough. You can even try using a beanbag or other bed that you can climb on into. Ending4: [substeps] A cave is an air-conditioned enclosure located out of the elements which is filled with loose blankets and straw. [title] Keep your dog's caretaker asleep inside.

Answer format: ending1/ending2/ending3/ending4