Hespic
From Tardis Wiki, the free Doctor Who reference
Hespic was a planet known for its amazing cuisine, not technologically advanced, this rural world appreciated a range of exciting vegetation (some may be deemed rude), that was for a very brief while accelerated by the arrival of a creature that resembled a cross between a chicken and a sheep that exuded some kind of super-fertiliser from its constant flatulence, probably attributed to its diet. It is unknown where the creature came from but was captured by the Doctor, Amy Pond and Rory Williams and moved to another planet where it could freely roam in return for helping stimulate the agriculture. (DWAM: Grow Your Own)