You can estimate a hamster's age by observing its body size, fur, teeth, and behavioral characteristics.
Body Size Changes: Young hamsters are small in size with a well - proportioned body. Adult hamsters are larger and may appear a bit chubby. Senior hamsters may seem slightly thinner due to a slower metabolism, and their body proportions may not be as even.
Fur Condition: The fur of young hamsters is soft, smooth, and shiny. As they age, the fur becomes sparser and the color fades. The fur of senior hamsters may lose its luster and may even experience hair loss.
Tooth Condition: Young hamsters have short, sharp teeth. The teeth of adult hamsters may show signs of wear and deformation. In senior hamsters, the teeth are more obviously worn, and they may even turn yellow.
Behavioral Characteristics: Young hamsters are lively, active, and full of curiosity. Adult hamsters are more independent. Senior hamsters may become quiet and slow in their movements due to a decline in physical strength.
These methods can provide a rough estimate of a hamster's age, but it's impossible to determine the exact age. If you need to accurately judge a hamster's age, it is recommended to take your pet to a veterinary clinic for regular check - ups.