Instruct: Classify the given Amazon review into its appropriate rating category
Query: Good size for Greenies treats or Nutro food

This ball fits about 1/8 cup of Nutro food. After I showed my cat how it works, he understood right away that he needed to roll the ball and then look for the food pieces on the floor. He can get all the food out in a couple of minutes, so it's not like I'm adding a ton of exercise to his day, but I still like the idea of making him work a bit for the dry part of his meals. Update: I tried it with the Greenies treats that he has shown little interest in so far, and it was great! The treats are a bit bigger than the food, so even though I only put 8 of them in the ball, it took him a lot more time and effort to get all of them out.