Melanie Griffith treats co-star like an animal!

An encounter with a canine co-star quickly brought out the animal in Melanie Griffith. The actress was holding the tiny dog in her lap for a scene in her fall CBS comedy when Melanie erupted.

“In her shrill, childlike voice, she kept shouting ‘shut up’ at the little dog,�? an insider told The ENQUIRER.

“The cast and crew thought the dog was just the sweetest thing, and it was shocking to hear her yell at such a helpless animal. Melanie went toe-to-paw with paltry Pomeranian, which was wearing a tuxedo for its appearance in “Viva Laughlin.�?

The 50-year-old star was dressed in black for a graveyard scene, but the somber atmosphere was shattered by the little dog growling at a horse on the set. The aggravated actress soon joined the fray.

“At first, Melanie sounded like she was yelling at a person, but the crew soon realized that her persistent ‘shut ups’ were aimed at the dog,�? said the insider.

Melanie’s mom Tipp Harden - who nearly goy pecked to death in the Hitchcock classic “The Birds�? – runs an animal sanctuary.

“Tipp’s dedicated her life to rescuing animals, and her daughter Melanie couldn’t even be nice to a dog for a few hours of shooting,�? said the insider.

“Melanie didn’t even bother to learn the little guy’s name. She just kept referring to him as ‘hey dog.’�?