Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to potty train a guinea pig [title] Observe your guinea pig. [step] Before you put a litter box in your guinea pig's cage, you need to watch her to see where she normally goes to the bathroom. Guinea pigs like to scent mark their territory, so your guinea pig will likely scope out a corner of her cage to pee and poop in regularly.

Ending1: [substeps] You may use baby diapers or a swaddling chair. If your guinea pig has a habit of peeing in the area where she normally does, she should likely use this area. Ending2: Observe how your guinea pig goes to the bathroom when you're not around, and make sure to check her toilet outside the toilet box. [title] Store uneaten litter in a safe, secure place. Ending3: [title] Keep your guinea pig close to the litter box. [step] Guinea pigs have excellent eyesight and follow scent patterns. Ending4: [substeps] Although there is one corner where she will go most often, this does not mean she will always go in this corner. Just pick the place she frequents the most.

Answer format: ending1/ending2/ending3/ending4