Here's a more detailed description:
* Size: Nits are about the size of a pinhead or smaller.
* Color: They are typically white, but can appear yellowish or brown depending on their age.
* Shape: They are oval-shaped and somewhat flattened.
* Location: Nits are usually found near the skin, close to the base of the hair shaft.
If you suspect your guinea pig has lice, a veterinarian should be consulted for proper diagnosis and treatment. They can use a magnifying glass or microscope to confirm the presence of nits and recommend the best course of action.