The mother of a one-year-old boy mauled to death by a family dog has paid tribute to her "little angel".
Archie-Lee Hirst died from multiple injuries
Archie-Lee Andrew Hirst was killed by the rottweiler at his grandparents' home in Wakefield, West Yorkshire.
Becki Hirst, who has just turned 18, said: "My boy was my world. He is loved by many. He will always be in our hearts, never to be forgotten."
Miss Hirst said her 16-year-old sister Kara - who tried to save Archie-Lee from the dog - was a "hero".
She said: "We are all so proud of her - she tried.
"She's a hero in my eyes and will be respected for what she did for the rest of her life."
Miss Hirst said her son was her "sleeping angel".
She said: "All I want is to give my baby the best send off that he deserves so my little Archie can rest in peace."
The boy's aunt tried to fight off the dog in the yard of the house
Earlier Miss Hirst left a message for her son on her page on the social networking site Bebo.
It said: "RIP my lil angel mummy knows your still here love u always and foreva x x x x x x."
Archie-Lee's father, Damian Williamson, 20, also left a tribute to his son.
"Never gona 4get ya lil man, RIP 4eva n always, miss ya so much, ur mummy sez i can ave ur iggle piggle, so gna keep him in car wi me xxxxx."
Dozens of shocked friends have also left tributes on the site.
Outside the house on Sunday, Det Supt Steve Payne said the family were united in grief.
He said: "The mother and father of Archie-Lee are together today and everyone involved is all back as a family unit at this distressing time.
"Obviously, the mother's 18th birthday being today doesn't help. New Year coming up doesn't help either.
"The focus of the investigation will now be to conduct house-to-house inquiries and try to build up a picture of anything that will help the investigation."
The government has said it has no plans to add rottweilers to the list of dogs banned under the Dangerous Dogs Act.
The boy's 16-year-old aunt had been looking after Archie-Lee and her two sisters, aged six and seven, at the house in Chald Lane at the time of the attack on Friday afternoon.
She kicked and struck the dog, which police said weighed between seven and 10 stone, after it pulled the boy from the arms of the seven-year-old girl.
Mother Becki had previously written of her joy at motherhood on the Bebo site and had posted 48 pictures of 13-month-old Archie-Lee.
Under the headline "Mummy to Archie-Lee", she wrote that she loved it when he "does his little giggle".
"I don't no what I'd do if I didn't have him," she said.
"Can't wait till he's walking and talking, it will be great. I hope his first word is mummy, it would make me so happy."
Friends of his father, Damian Williamson, 20, who lives separately from Ms Hirst in the Wakefield area, have also paid tribute to Archie-Lee on his Bebo profile page.
The two-and-a-half year old rottweiler was killed by police following the attack as it was "clearly representing a potential danger to others".