Actress Lena Dunham has defended her right to keep a rescue dog after she was accused of failing to properly train the animal.

On Wednesday (28May14), the Girls star and creator posted a photo on Instagram.com which showed her injury after her pet pooch, Lamby, bit her on the bottom.

Since sharing the photo with her followers, Dunham has been criticized by a number of pet owners and animal activists who claim she has failed to train her dog properly.

One outraged writer on Gawker.com even wrote an article titled "Take Away Lena Dunham's Spoiled, Vicious Dog Before It Attacks Again", noting the actress is "unfit" to own a pet.

Dunham took to Twitter.com on Thursday (29May14) to defend Lamby, a "special-need" dog which she rescued from a shelter in Brooklyn, New York last year (13).

She writes, "I cannot believe I am about to type the following series of tweets. Advance apologies: Last night I posted an image of my butt after my dog was scared by the doorbell, jumped up and bit me...

"We have a special-need rescue dog who has bitten me twice, under specific circumstances, in our own home... He has an amazing trainer... We monitor him closely. He's never show (sic) aggression to anyone anywhere else but that doesn't mean he couldn't, so I'm vigilant. But... "

She continues, "(I) got pretty defensive. On the topic of my dog. I'm just saying the concerned folks should go back to reading the news. There's a bunch. And in conclusion, to the 'tipster' who told Gawker I was feeding my dog a plate of salmon at an outdoor cafe. F**k yeah I was."