It's true that Humans Are Bastards. That, and centering works around colorful animals is more child-friendly. So for these reasons, a lot of works center around animal characters, with only a very small amount of human characters.

Specific Versions:

• Humans exist and everyone knows about them, but they are very rare in the setting. Other characters might be Funny Animals, fantasy creatures, aliens, etc. (Example: Adventure Time).
• Humans are very common, and may be the dominant species, but only a few appear in the story, which is dominated by animal or fantasy characters (Exammple: Finding Nemo, Bambi).
• Humans are everywhere, but mostly you might just see their feet or vehicles from the point of view of an animal character. There are only a few human characters that have a speaking role (Example: Oliver And Company).

See also Xeno Fiction, Beast Fable, Humanitys Wake, and World Of Funny Animals for when there are no humans at all.

Examples:

Anime:

• The Pokemon short film Pikachu's Vacation, which was played before Pokemon The First Movie and is on that movie's DVD, only has the trainers at the very beginning and end.

Film:

• In Bambi humans don't appear often but play an important role.

Newspaper Comics:

• The only human characters in US Acres are a farmer and his daughter who appeared right after Orson fell out of the truck and took him to the farm. They only appeared for four strips, were only seen waist-down or in silhouette, and never appeared again.
• Stephen Pastis's Author Avatar is the only human main character in Pearls Before Swine. However, one-shot human characters appear quite often.

Western Animation:

• Ronald-Ann was the only human that appeared in A Wish For Wings That Work.
• The Tom And Jerry cartoons; we only ever see the legs of a housemaid, and Tom is "just" a cat while she's present.
• My Little Pony (ONLY G1, though, in which Megan and friends are the only humans, all others are World Of Funny Animals)
• Sponge Bob Square Pants