A dangerous dog that has killed two family pets in Brisbane is set to be euthanised after its owner failed to keep it locked up.

Residents in Sherwood say the staffordshire bull terrier was becoming more aggressive and posed a threat to children.

Jessie Lafferty-Delaney told 9News the dog mauled her cat to death in front of her young son in their driveway in April.

A dangerous dog that has killed two family pets in Brisbane is set to be euthanised. (Nine)

“The dog just grabbed him by the throat and started tearing him to shreds,” she said.

“We’re just living in fear, constantly.”

“If it keeps going for small animals, what’s it going to take before it goes for a child?”

Amanda Tuppack says the same dog killed her cat Penelope months earlier.

“I had to hold on to the dog and called council but eventually the owners showed up and collected the dog,” Tuppack said.

Amanda Tuppack says the same dog killed her cat Penelope earlier this year. (Nine)

Brisbane City Council declared the dog dangerous in May.

The owner was therefore required to keep the dog in an approved enclosure and fit it with a council-issued collar and a muzzle when it leaves the house.

Residents say the owner was violating regulations and the dog was seen in public without a muzzle.

9News understands the owner has been fined five times for letting the dog wander.

Following inquiries by 9News, Brisbane City Council today issued an order for the dog to be euthanised for community safety.

Brisbane City Council declared the dog dangerous in May. (Nine)

“The owner of this dog has not taken the adequate measures to secure their dog,” Councillor Sarah Hutton told 9News.

The owner now has the opportunity to appeal.

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