If you want your guinea pig to love cake, then you should try guinea pig cake. This delicious cake contains chocolate and caramel and is covered with marshmallow fondant. The cake also contains treats like chocolate-covered coffee beans and grass (shredded coconut dyed green). For a fun twist, you can add whiskers made of whole wheat spaghetti.
Fruit is a great source of vitamin C for your guinea pig. However, you should make sure your pet gets their vitamin C requirements from their normal diet. A twig from a fruit tree will also make an excellent treat. This will help your pet keep its teeth short.