On another occasion she was at nursery when I got a call to say she'd fallen and her bottom teeth had gone through her bottom lip.
"When I arrived to take her to hospital, she wasn't even crying. That's when the doctors first noticed something was wrong."
Olivia is thought to be the only person in the world who suffers from all three symptoms of a rare disorder
Olivia is thought to be the only person in the world who suffers from all three symptoms of a rare disorder SWNS - ROSS PARRY
But full-time single mum Niki said she knew Olivia was different when she was born. She added: "She doesn't let any of this affect her - because for her, she's normal. She's never experienced pain, or hunger, or tiredness.
"She has now been conditioned to eat because everyone else eats but she could do without it and takes special medication to sleep six hours a night. It was such a battle for us to find out what was causing her symptoms.
"The doctors had no idea what could be wrong with her. This is why I want to raise awareness of chromosome 6 problems. To look at Olivia you don't know anything's wrong with her. I want people to know and to stop judging.