Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep a dog off the couch [title] Buy a comfortable pet bed for your dog. [step] Pay attention to how your dog likes to sleep and then buy a bed that supports its sleeping style. For example, if your dog usually curls up into a ball on the couch, buy a donut or bolster bed.

Ending1: When you are cuddling your dog on the couch, consider buying a cozy bed made of plastic. [substeps] Many pet beds are equipped with an additional top mattress and make it easier for your dog to rest on your couch. Ending2: If your dog tends to urinate or defecate on couch pillows, consider a flower or big-pillow bed. [substeps] Avoid pet beds made out of plastic, as plastic can make your pet uncomfortable when they urinate and defecate on couch cushions. Ending3: If your dog likes to spread out on the couch, purchase a soft, cushion bed. [substeps] Make sure that the bed is the right size for your dog. Ending4: [substeps] If your dog tends to roost on sofas or other furniture, then get a bed that has a metal, or synthetic, center brace. [title] Choose appropriate bedding for your dog.

Answer format: ending1/ending2/ending3/ending4