Marmaduke (character)

Marmaduke is the protagonist of the his own comics, series, and film, a messy but lovable Great Dane owned by the Winslow family; Marmaduke is a very large example of the breed and has regularly been drawn as apparently measuring 40 inches (102 cm) and upwards at the withers.

Marmaduke (film)
In the movie, all he wants to do is fit in at the O.C dog park. He finally realizes fitting in is not how to make the park like a real dog park. He is significantly larger than a regular dog.

Marmaduke first appears with a huge white plastic collar around his neck and takes it off from the fence, he introduces his family. After digging a hole in Phil's garden he gets a bath, but then he jumps out and tries to get through a doggie door (which he explains he got it at 2 months old and can no longer fit). That night, he searches for a thing to eat. Then he farts badly making the parents wondering what he ate.