Why did my hamster change colors in the summer?

Hamsters can change colors due to seasonal changes in their environment, which can trigger hormonal responses. Some breeds, like the Siberian dwarf hamster, exhibit a change in fur color as a way to adapt to their surroundings for camouflage. Additionally, factors such as diet, health, and exposure to light can also influence the pigmentation of their fur. If the change is significant or concerning, it's best to consult a veterinarian.