When it comes to guinea pig care, hay isn’t a side dish—it’s the main course. Your piggy’s health, digestion, and happiness all revolve around one magical material: fresh, high-quality hay. But with so many types available, how do you know which one is right?

When it comes to guinea pig care, there’s one word you’ll hear over and over again: hay. And with good reason. Hay isn’t a side dish—it’s the main course, the enrichment zone, the dental tool, the nap nest, and the snacking soulmate. If you're new to piggy parenthood or just want a refresher, here’s your crash course in all things hay.