Here's why:
* Chocolate is toxic to guinea pigs. It contains theobromine, a compound that can cause serious health problems, including heart problems, seizures, and even death.
* Hot cocoa is high in sugar. Guinea pigs have sensitive digestive systems and too much sugar can cause digestive upset and other health issues.
* Milk is not necessary for guinea pigs. Guinea pigs are herbivores and don't need milk products. In fact, many guinea pigs are lactose intolerant.
Instead of hot cocoa, offer your guinea pig fresh hay, vegetables, and a small amount of fruit. This will give them the nutrients they need to stay healthy.
If you're concerned about your guinea pig's health, always consult with a veterinarian.