This is a test of commonsense. Complete the next sentence:

How to give your guinea pig a good, healthy diet
Select a good pellet.
Make sure the pellets you select have nutritional value. Plain pellets without any added seeds or colored treats should be selected.
This ensures that your guinea pig will be eating the nutrients it requires without all the sugar and dangerous bits and pieces inside. Use alfalfa based pellets for guinea pigs under 6 month old and timothy based pellets for older guinea pigs.