Massive Animals

Ginormous Grizzly

These photos came to me in various email forwards, often with claims about record sizes. I checked out the bear photo and found it's legit (i.e., not Photoshopped), though you could argue the foregrounding of the bear's head relative to the human exaggerates its size.The rest look convincing, but I don't vouch for them.
Immense razorback hog (feral pig)

Monumental rabbit
Excessive cat
Too much fish for just one dish
Giant dog with normal-sized horse and humans