Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to feed a guinea pig a well balanced meal [title] Purchase a bag of hay to feed your guinea pig. [step] Fresh hay is an important element of a guinea pig's diet and overall health. This is because guinea pigs need hay to keep their teeth from overgrowing.

Ending1: Hay also contains the right balance of calcium that guinea pigs need. In addition, hay keeps their digestive system clean. Ending2: Of course, guinea pigs are not picky eaters, but just like humans, guinea pigs are picky eaters about what's important and what you need. For the most part, you should get a bag of hay made out of a heavy fabric, which will provide nutrition. Ending3: A good combination of color and texture with hay will help to keep your guinea pig's teeth healthy. [substeps] Choose short hay to avoid feeding your guinea pig hay that is too tall. Ending4: Purchase a large open bag of hay, preferably the fabric bag type, and place several hay cubes in it. [substeps] Make sure to wear gloves as you are scooping hay into your bag.

Answer format: ending1/ending2/ending3/ending4