A dog trainer has begged for help with her "untrainable" pup who appears to have a split personality from seeming like "butter wouldn't melt" to suddenly turning "nasty".
Nicole Hammer, 57, has been forced to admit defeat with her four year old, Jack Russell, Noushka and is now looking for someone who can help take her on part time to settle her fiery nature.
The canine behaviourist who lives in Anglesey, North Wales claimed the sweet-looking pup is clever, quick to learn tricks, sleeps 12 hours every night and doesn't even complain when she's dressed up.
But despite rolling out her charm for people, Nicole says Noushka switches to a "dark side" at the sheer sound of another dog and has subsequently attacked multiple pets in her village.
Speaking to NorthWalesLive, Nicole said: “Everyone says, 'ah, she is so sweet, so cute, she’s lovely'.
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“She charms just about everyone. She really is great with people.
"But when another dog so much as growls, she flies into a fury. She always has done.
“It’s the terrier DNA. She has a dark side, a nasty streak.”
Nicole, who is originally from Germany, bought Noushka through a Facebook advert from farm breeders and set about training her straight away.
But the rough-coated Jack Russell first developed a penchant for chasing sheep, and Nicole had to seek the help of a farmer to teach her pup to ignore livestock.
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Then Noushka became fixated with poodles, which became primary targets for the then 18 month old pup.
In recent weeks, Noushka has attacked the neighbour's dog, Buster and an elderly dog who came to visit some of Nicole's neighbours.
The mischievous Jack Russell had ran out into the neighbours garden, leapt into the friends' car and latched onto the older pooch.
Although Nicole insists she never draws blood it was several minutes before she was able to prize Nouskha from the other animal.
“She latches onto dogs with her mouth but she doesn’t draw blood,” said Nicole.
“People think she biting their dogs but it’s all snarls and saliva.
“As a canine behaviourist, it’s embarrassing,” she said.
“I have had much success with other dogs but not this one.
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“In Germany, other trainers say not to worry, they all have a terrier in the cellar. This means they all know you will one day get a terrier that is untrainable.”
Keeping Noushka on a lead and muzzled constantly is inadvisable for her energetic breed, Nicole claims.
Instead she has been advised to launch a Facebook appeal to see if any local farmers need a good ratting dog, who may be able to channel her temperament for a good cause.
Nicole said: “I can’t walk through the village and tell people I am giving her away – they will think I am terrible, I am cruel.
“But that may have to be my last option.
“Most of the time she is lovely - she even loves our postman!
“But I have to be straight with people, she has two sides to her personality with that terrier aggression."