Hamsters can eat apples, however they should be prepared without the skin or seeds. It is also recommended that the apples be chopped into small pieces, particularly for baby hamsters.
New foods should be introduced slowly to your hamster to avoid upsetting the animal's digestive system. Once your hamster is used to the new food and likes the apples, then you can feed them apples more often. Rinse the fruit, ensuring that pesticides are washed away. Let the apple sit at room temperature and do not serve it straight from the cooler. Cold food may give your pet an upset stomach. One daily fruit and one vegetable is a good amount for your hamster.