Charlie Sheen has called Denise Richards a ''pig''.

The 'Anger Management' star fell out with his second ex-wife before Christmas - accusing her of deliberately taking their daughters Sam, nine, and Lola, eight, away from him over the festive period - and as their feud worsens, he has started a cryptic Twitter tirade against her.

He wrote: ''Hey Denise, I own the farm. yet you are only pig in the pen to sling mud bile & sh**e every inch your evil cloven hoofs trample. c #Oink.(sic)''

In another tweet he attached a picture of a severed pig's trotter and wrote: ''it must suk for an evil heel like you, not to be able to ware ''heels'' bekuz yu have this klump of funk.... c #Fu''

Charlie has also been threatening to force Denise - who also has two-year-old adopted daughter Eloise - out of the home he bought for her in the same Californian gated community where he lives, and sources say his girlfriend, porn star Brett Rossi, is behind his actions.

One source said: ''Brett wants Denise out of the neighbourhood because she is insanely jealous of her.''

Brett - who has only been linked to Charlie since December last year - has also written an open letter giving her view on the situation.

In the statement posted online, she says: ''I AM a child of divorce. I AM an advocate for children having a loving, healthy relationship with BOTH parents and always will be. I have NO problem helping make this happen, however such as life there should always be boundaries ...

''Think about the babies and not ones own frustration or disagreements. It should always be about THEM. You protest privacy yet running to the press doesn't make you exactly a saint. If you want something from someone, I was raised to display the respect before it is earned. I ask, respectfully, to please keep my name out of your mouth such as I respectfully have ALWAYS done for you without any hesitation. (sic)''

Charlie has already made moves to evict his third wife, Brooke Mueller - with whom he has four-year-old twins Bob and Max - from another house he bought in the same community.