Oxbow and Kms Food with Timothy Hay

They ALWAYS need unlimited hay. It's not so much the fiber you need to provide it's the fact that hay helps wear down their teeth and aids in a healthy intestinal tract. Pellets and veggies alone cannot do these things.

It's not really possible to give a guinea pig too much fiber. Also the fiber in hay isn't quite the same as the powderized fiber in pellets. It's the long strand fiber in hay that helps with digestion and keeps the teeth worn properly. Pellets, wood chews, and other things do not wear the teeth as well or evenly as hay and the fiber in pellets is not nearly as useful. KMs pellets despite being lower in percentage are actually better in fiber because they contain longer strands. If you get an oxbow pellet wet it forms a mash or if left to dry a powder. If you get KMs pellets wet you have a pile of tiny wet hay bits with some powder around it.