News presenter Sian Williams has told how she was left "sore, swollen and bruised" after she was attacked by a friend's neighbour's dog.
The former BBC Breakfast star, 51, posted images of her wounded knee on her Twitter page, saying that the pet "would not stop" and that the attack "lasted ages".
The Channel 5 newsreader was prescribed antibiotics and also underwent a tetanus injection.
Some fans asked if the presenter knew who the dog belonged to and urged her to report the incident to the police.
Sian later said she would get her friend to talk to the dog owner.
When one follower told her that the wound was "probably a subperiosteal haematoma (bruise on the bone) from the bite - painful but it passes", Sian replied that she was in pain.
Sian presented the BBC's Breakfast programme for 11 years but quit when the show's move to Manchester was announced.
She revealed in May that she has had a double mastectomy after being diagnosed with breast cancer.
Speaking publicly for the first time about the disease, the newsreader said that her biggest fear was not seeing her two young children grow up.
"My biggest fear was not being there as a mum - and for some unfathomable reason, I couldn't stop thinking that I want to be here for my daughter Evie to watch her get married," she said.
"My aunt died of breast cancer, and I'd lost my mum to liver and bowel cancer - and I gradually began to realise how bewildered and scared I was."