Monster egg turns out to be no yolk

When Rosaleen McNeilly saw a giant chicken egg resting in her backyard chicken coop she thought someone must have been playing a joke on her.
The monster of an egg is more than three times the size of eggs Mrs McNeilly is used to collecting at the back of her Sheppard St home.
It weighed 180g on her kitchen scales and was slightly larger than a tennis ball. Another egg from the coop weighed 50g.
The egg was so big, it almost did not fit in the egg cup.
"My poor chicken," Mrs McNeilly said. She has had her two red shaver hens Biddy and Liddy for about three months but the enormous egg was Liddy's first lay. Mrs McNeilly said she could not believe her eyes at first.
"I thought 'someone has put a plastic egg in here'. But they didn't, it's actually real," she said.
Red shaver hens can lay between 305 and 315 eggs a year and were considered prolific producers of large brown eggs.
Mrs McNeilly was surprised to see Liddy had showed no sign of distress since her big lay.
"I was scared to go out there the next morning in case she had died," she said.
Friends and family shared Mrs McNeilly's initial disbelief.
Mrs McNeilly feeds pellets, bread and scraps to her chickens.
She plans to "blow out" the egg so she can keep it.
EGG FACTS
* Typically a medium egg is 49g and a jumbo egg is 70g.
* The World Records Academy claim the world's largest chicken egg was laid in China last year, weighing 201g.
* The chicken that laid the 201g egg was fed dog food.
* An ostrich egg, at 1.49kg, is the largest egg in the world and looks about the size of a melon.
* The bee hummingbird has the smallest eggs in the world weighing 0.5g and about the size of a pea.