What is one common tool used for grooming cavies?

The use of a fine-toothed comb or slicker brush is essential for grooming cavies, especially when it comes to managing their fur and skin health. This type of grooming tool is designed to efficiently detangle and remove loose hair, dirt, and debris from a cavy's coat, promoting a healthy and shiny appearance. It helps prevent matting and can stimulate the skin, distributing natural oils to keep the coat in good condition.

The other tools mentioned do not serve the same specific purpose. A hairdryer, while it might seem useful for drying after a bath, can be too harsh for a cavy's sensitive skin and does not help with the grooming process itself. A regular household broom is not suitable for grooming animals, as it is designed for cleaning floors rather than caring for fur. A sponge, although useful for cleaning activities, does not have the necessary structure for effectively grooming or maintaining a cavy's coat. Thus, the fine-toothed comb or slicker brush stands out as the most appropriate and effective grooming tool for cavies.