RPatz and KStew square off over beloved pooch…

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Get ready for the mother of all bitter custody battles, ever…

No, Tom Cruise isn’t about to fight Katie Holmes for Suri, even bigger that that (ahem, joke!) Robert Pattinson and Kristen Stewart are about to go head to head over the custody of their dog, Bear.

After news broke last week that the naughty actress had a shock affair with film director Rupert Sanders, R-Patz swiftly moved out of the mansion they shared in Los Angeles.

Now, according to well-placed sources, the newly-separated couple have since agreed that Stewart, 22, will keep her cat, Max, but Rob wants full ownership of the dog they recently adopted from a New Orleans shelter.

The shamed actress, who plays Bella Swan in The Twilight Saga, is particularly fond of the pooch, having helped Rob, 26, to nurse him through potentially fatal canine disease, parvo.

One source said: “After Rob moved his things out of their Los Angeles apartment, the then told Kristen he wanted Bear.

“She was heartbroken – they adopted Bear together and she’s always felt that he was their little baby.

The source added: “But Rob was so hurt by Kristen’s actions he decided that he wants the dog to help him get over what happened. After all, a dog is a man’s best friend and Bear is such a good companion.”

Insiders are now saying that Kristen is getting ready to put up a fight to keep hold of the pup.

“Kristen won’t give up Bear in a hurry. She helped Rob save Bear from Parvo disease, which nearly took his life when he was a puppy.

“She wants joint custody – and it could get a little messy,” the source claimed.

I hope the couple gets to sort things out before the release of The Twilight Saga: Breaking Dawn – Part 2, this type of public brouhaha is sure to affect the promotion of its upcoming release… I say give it up K-Stew, you are not the popular bunny you use to be!

Even though they say, “All’s fair in love and War Paw!” Um, not in this case…

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