Hay provides fiber that promotes constant digestive movement for small herbivores, helping them maintain a healthy weight and supporting digestion. Veterinarians recommend that hay makes up 70-80% of a rabbit and guinea pig’s diet.

Chewing hay helps small herbivores such as rabbits, guinea pigs, and chinchillas maintain the dental health. Since their teeth never stop growing, hay provides proper wear on their "open-rooted" teeth.

Hay provides mental stimulation, encourages natural foraging behaviors in small pets, making it an essential part of their living space.