Which of the following could be considered a fault in rabbits?

A fault in rabbits refers to any physical traits or conditions that deviate from the breed standard, potentially impacting the animal's overall health or appearance. Broken toenails are indeed considered a fault because they can indicate a lack of proper care or management, potentially leading to further health issues or discomfort for the rabbit. Maintaining healthy, well-groomed nails is essential for a rabbit's well-being, as broken or improperly trimmed nails can affect their mobility and overall quality of life.

In contrast, strong body structure, bright eye color, and healthy coat condition are attributes that align positively with breed standards. A strong body structure contributes to the overall health and vitality of a rabbit, while bright eye color often reflects good health and vitality. Similarly, a healthy coat condition is indicative of proper nutrition and care, enhancing a rabbit's appearance and showing that it is well taken care of. These factors are generally seen as desirable rather than faults.