What is an outcome of a cavy being well-accustomed to handling?

When a cavy is well-accustomed to handling, it leads to stress reduction during shows. Cavies, like many animals, can experience anxiety in unfamiliar environments or when handled by people they do not trust. By exposing them to regular handling and socialization, they become more comfortable and relaxed in stressful situations, such as at a show. This familiarity can help them behave more calmly and confidently, ultimately enhancing their performance and the overall experience for both the cavy and the handler.

The other options involve aspects that may not be directly influenced by regular handling practices. While better grooming practices can stem from familiarity, they are not guaranteed outcomes of handled cavies and can be influenced by other factors like the owner's knowledge and skills. Weight loss might occur due to stress, but it is not a desired or healthy outcome linked to handling. Height increase is unrelated since a cavy's size is determined genetically and does not change through handling.