How can you determine the age of a cavy?

Determining the age of a cavy can be effectively accomplished by examining the size and condition of their teeth. Cavies, like many rodents, have continuously growing teeth. As they age, the wear and the condition of their teeth can reveal a lot about their age. For instance, younger cavies typically have a certain size and a sharper, less worn appearance to their teeth, while older cavies show more wear, potentially discoloration, and may have noticeable changes in tooth structure due to long-term wear and health issues.

Other methods like observing fur color or behavior may provide some clues about a cavy's age but are not as reliable or specific as dental examination. Height may give an indication of growth but does not directly correlate with age, as individual cavies may grow at different rates depending on their breed and care. Therefore, focusing on the teeth provides the most accurate means of determining a cavy's age.