Meatabix is a dog food company featured in The Wrong Trousers. It is an obvious parody of Weetabix.
While pursuing the dastardly Feathers McGraw, Gromit hides inside an empty Meatabix dog food box that was discarded in a back alley. Using his trusty pocketknife, Gromit cuts a pair of eye holes in the box.
Gromit fears that Feathers might have seen his eyes gazing out of the box, however luckily the eye holes lined up with the eyes of the cartoon dog on the package, therefore camouflaging them into the package's design and making him unseen by the evil penguin.
The empty Meatabix dog food box also appeared in Project Zoo in the Zoo Keepers' patrolling maze area of the Warehouse level
Meatabix is also the bed of Fluffles in A Matter of Loaf and Death.
Trivia
Meatabix’s name refers to the food WeetaBix but it’s meat for dogs instead of a biscuit made with wheat.