Wheatgrass is a food prepared from the cotyledons of a common wheat plant.
Wheatgrass differs from wheat malt in that it is served freeze-dried or fresh, while wheat malt is convectively dried.
Claims about the health benefits of wheatgrass range from providing supplemental nutrition to having unique curative properties, though few, if any, have been scientifically proven.
It is often available in juice bars, and some consumers grow and juice wheatgrass in their homes.
It is available as fresh produce, tablets, frozen juice and powder.
Wheatgrass is also available commercially as a spray, cream, gel, massage lotion, and a liquid herbal supplement. (source)
So can hamsters eat wheatgrass?
Yes they can eat it in small amounts, but nothing more that.