Tzar the giant rescued Russian dog should only be re-homed in a massive estate to keep people safe.

That is the decision of Kathy Trout, founder of West Yorkshire Dog Rescue in Marsden, who is worried that the 10-month-old puppy estimated to eventually weigh up to 15 stone, could grow up to become aggressive and dangerous to people.

She said that she now believes Tzar, who the centre initially thought was a rare Caucasian Shepherd Dog, should “ideally live somewhere like the Highlands or on an estate like Longleat or Harewood” of either “at least 100 or 1,000 acres”, where he will have freedom to roam and be kept at a distance from the public.

Kathy made the remarks after undertaking more research into the breed and other similar Central Asian dogs, of which she now thinks he could be one, but who are collectively known to be so protective to the point they can be dangerous.

Dog fosterer Jean Thewlis with Tzar, the giant Russian dog who needs a new home

She said that she does not want to begin advertising to re-home him until the centre staff know the full facts about his breed.

Kathy said: “We are in uncharted territory and want to be extremely careful in re-homing him, especially because now we are unsure as to whether he is the breed we thought.

“We need to look at this to try assess his likely future temperament.

“An expert is coming in to do this and while there are no hard and fast rules as to how he could turn out these dogs are bred not as people dogs but to guard sheep on plains and mountains and can attack wolves.

“In fact, this dog is the closest thing I know to a wolf and for it to have ended up in the UK is ridiculous– these dogs are not trainable like your average family dog.

“Tzar is as soft as butter at the moment but we want there to be no chance of him harming someone when he’s older so when we formally advertise him we need someone who can handle him and has at least 100 or 1,000 acres in somewhere like the Highlands or on an estate like Longleat or Harewood.

A cruel owner lopped off Tzar's ears to get him ready for dog fighting

“He should live somewhere with no public footpaths and very few visitors.

“I’ll make sure I get the right home for him, even if it takes me two years.”

Kathy has been threatened by a man regarding the dog and is outraged that the type is available to obtain in the UK.

As previously reported, Tzar was handed into the West Yorkshire Stray Dog Pound where his previous owner told handlers that he had been imported for £3,000.

“I was threatened on the phone last Friday by a man who said I’d stolen the dog from him which is totally untrue and I think these aggressive people are the sort this sort of breed attracts,” she said.

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“It’s not good news at all they are now available to buy in the UK.

“Since the Anti-social Behaviour, Crime and Policing Act came into force last year owners can now be held responsible for the acts of a dangerous dog and it has led to the Government looking at breeds more closely.

“But we need to get our act together and ban people from breeding them.”