A freak chicken has managed to lay three giant eggs - one containing another fully formed egg nestled inside.

Bruno the hen, who only lays double-yolkers, is thought to have been responsible for the egg-ceptional batch discovered this week.

The Oliver family were shocked when they cracked open one of the enormous eggs and saw a yoke along with another egg with a completely intact shell inside.

The monster egg measured a staggering 8.5in high around the base and the point and weighted nearly 5.5oz (152g) - around three times the weight of a standard chicken egg.

The rare specimen was one of three huge eggs that were laid by the prolific chicken owned by the family and kept in their garden near Faversham, Kent.

Mum Samantha Oliver filmed her son Kieran, 11, cracking open the chunky egg as the runny white and yoke dropped into the pan, followed by another fully formed egg - much to their surprise.

The 29-year-old said: "I'm just amazed. I have 10 chickens and two often lay double yolks, but I've never seen anything like this before.

"Lots of people around here have had chickens for years and nobody we've spoken to has seen it before.

"It is quite a rare thing and to have it happen three times is even more rare."

Miss Oliver got her chickens about eight months ago to help keep her three boys Kieran, Henry and Thomas occupied during lockdown in their rural village of Painters Forstal.

But on her usual morning trip at around 8am to feed the hens and collect eggs, she discovered the first giant egg nestled in the chicken coop.

She added: "At first I thought maybe it's two eggs, or one of the dummy eggs that you have to put in to encourage them to lay.

"But I pulled it out and realised it was a real egg and came running in to show the boys."

Miss Oliver found the egg measured a staggering 8.5in high around the base and the point - close to the world record for a chicken, which is thought to be 12.2in, but still much larger than normal eggs laid by this species.

It weighed in at 152g - nearly 5.5oz and around three times the weight of a standard egg.

Two days later, she was surprised to again find another giant egg of exactly the same size and then yesterday afternoon (Weds) discovered yet another massive lay.

Miss Oliver said: "It's a fluke to get one that size, let alone three within a few days. I don't know if that's what's going to happen every time from now on. They often lay every other day, so maybe tomorrow there will be another one."

On Tuesday night, she and her sons cracked open one of the massive eggs and were gobsmacked to find it contained not only a yolk and egg white - but a perfectly formed normal-sized egg also inside.

The mum-of-three said: "My youngest son and my middle son were saying 'oh my God, on my God'. My eldest son was putting it all on TikTok.

"I'm just amazed. I know we've had double yolks before, but this had a lot of yolk and white inside as well as the egg. We didn't eat it, because I'm not 100 per cent about it."

This phenomenon is called a counter-peristalsis contraction and occurs when an egg reverses its course in the hen's oviduct causing another egg to form around it.

Miss Oliver said it is tricky to know exactly which of her 10 chickens - all of which have been given masculine names by her sons - laid the giant eggs.

But they suspect it to be a hen named Bruno, who has only ever lain double-yolkers.

Although initially concerned the huge eggs could have harmed the hen, Miss Oliver said Bruno is "fine".

She added: "I got so worried and thought 'oh my God I'm going to go out there and one of them is going to have died'. But they're all absolutely fine."

Filmed 1st August 2021.