From Cascade News: Mail Online
By Helen Pow
A Labrador puppy has aptly been named after the comic book hero 'Hulk' - not for it's super-strength but because it has a peculiar green coat.
Naomi Grimes and Kyle Murray's two-year-old golden Labrador, Buttons, gave birth to eight adorable puppies at their Clayton-le-Moors, Lancashire, home recently.
But the couple was shocked when the second in the litter came out with an usual green glow.
Rare condition: Hulk, the 'golden' Labrador, was born with a green tinge in Clayton-le-Moors, Lancashire
The other seven puppies were born - during the 28-hour labour - with normal golden coats.
Concerned, Ms Grimes and Mr Murray did a quick internet search and discovered that young Hulk had a rare condition that occurs when the pup's mother - in this case Buttons - is exposed during pregnancy to a substance called biliverdin, which can be found in the placenta.
This has the bizarre effect of dying the puppy's coat green - and it almost always happens to very light-coloured puppies.
Wears off: Owner Naomi Grimes, pictured, was trying not to get attached to the pups but said Hulk was too cute
The condition doesn't harm the puppy, it is simply a discolouration in the birthing process.
Ms Grimes' mother Sandra Grimes, who was visiting when the pups were born, said the whole family was stunned by Hulk's unusual colouring.
Hulk turned green because of a green bile pigment called Biliverdin that is found in the placenta of dogs.
On very rare occasions, the substance can stain the puppy's coat when it mixes with the mother's amniotic fluid - the liquid that protects and nourishes the pup.
It is most visible on light-coloured breeds such as Labradors, is harmless and wears off after a few weeks.
In humans, Biliverdin is responsible for the greenish colour seen in bruises and also causes jaundice in babies.
It is also found in the blue-green blood of many fish, the wings of moth and butterflies and the eggs of frogs.
'At first we thought it must be just because of the birth and it would wash off,' she said.
'When that didn't work we got a bit alarmed and starting searching the internet.'
The family quickly learnt that the condition fades within a few weeks, luckily for Hulk.
'Hulk is adorable and when his brothers and sisters huddle together he has to be on top and in the middle so he can get as warm as possible,' Mrs Grimes added.
Naomi Grimes has been trying not to get attached to the cuddly dogs, but she said Hulk has pulled at the couple's heart strings.
'We've tried not to name the puppies because they are for sale and we don't want to get attached, but Hulk is really cute,' she said.
'It wasn't totally obvious at first, but when we put him down next to the others you could really see it. Hulk is definitely one of a kind.'
Hulk isn't the first Labrador to be born the wrong colour.
In 2010, a Labrador puppy born with green hair made a sensation in Sao Paolo, Brazil.
The pup, also called Hulk after the superhero, was born in the town of Mairinque, 65 km from Sao Paulo, in a litter of nine puppies.
As in the Lancashire case, his brothers and sisters all sported regular coats.
But after 10 days, the Brazilian Hulk had lost his green pigment and was indistinguishable from his 'golden' siblings.
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