Originally Posted by DBS.US

In captivity, squirrels need to be provided with a variety of foods to make sure they are getting the proper nutrition. Good mixtures to feed your squirrel include vegetables (such as celery, carrots, green beans, and romaine lettuce), and many fruits (such as apples and bananas). You can also try insects and mealworms. Parrot food is another good choice since it has many seeds that squirrels like. Calcium is also very important, so you should include a calcium supplement for squirrels kept as pets. There are many types of tablets and powders available at pet stores that can be used.

Squirrels teeth grow constantly throughout their lives, and so you should make sure that they are provided with chewing material. Hard bark and large bones are good for this.

Make sure there is a constant supply of water for your squirrel. Put water in a heavy dish or in a water bottle attached to the side of the cage. Also make sure to thoroughly clean food and water dishes daily with hot water.