Cardboard is a heavy type of paper which is notable for its stiffness and durability.
Different types of cardboard range from a simple thick sheet of paper to complex configurations that feature multiple corrugated and uncorrugated layers.
In buiness and industry, more specific terms are used as cardboard is too generic a term.
So can gerbils eat cardboard?
Yes they can they are great for gerbils to chew on. Empty toilet rolls are especially good in this regard.
They make fun objects for gerbils to play with and run through as well as to chew on. They also fit nicely into their enclosure and don’t take up too much space.