Guinea pigs are highly social animals with demanding dental health requirements that are frequently misunderstood, leading to preventable suffering in millions of pet animals.
Guinea pig welfare suffers from widespread misunderstanding of their fundamental needs. The persistent keeping of solitary guinea pigs reflects a failure of public education - these are animals that evolved in social groups and experience isolation as chronic stress, not simply mild inconvenience. Dental disease is the second major welfare problem: a guinea pig eating inadequate hay develops malocclusion that causes pain with every bite, leading to reduced food intake, weight loss, and progressive deterioration. By the time owners notice reduced eating, dental disease is often advanced. The combination of social deprivation and dental disease means that many pet guinea pigs experience poor welfare throughout their lives despite owner affection.