What two problems do rodent owners frequently deal with regarding their pets?

Rodent owners often deal with issues of biting and aggression due to the nature of these small animals. Rodents, particularly species like hamsters and gerbils, can exhibit defensive behaviors when they feel threatened or stressed. Biting can occur if the animal is startled, mishandled, or not properly socialized. It's essential for owners to understand the body language of their pets to mitigate these issues and create a more trusting environment through gentle handling and positive interactions.

In contrast, other options like disobedience and hyperactivity are less relevant to rodents since they don’t typically respond to commands like dogs or are considered disobedient due to their nature. Obesity and excessive barking are issues more aligned with dog ownership rather than rodents, as rodents don't bark. Lastly, while social withdrawal and cage cleanliness can be concerns, they are not among the most commonly reported problems that specifically pertain to biting and aggression in rodents. Therefore, the correct answer highlights the behavioral challenges that are most pertinent to rodent owners.