A severely injured dog that was doused in petrol and set on fire after being stolen has been put to sleep, her owner has confirmed.
Detectives described the "horrific" and "targeted" attack as part of a "ongoing dispute" and have arrested a man.
The spaniel, called Lucky, was taken from a garden in Ouston, near Chester-le-Street, County Durham, at about 22:00 BST on Wednesday.
Her owner Angela Clennell confirmed Lucky died "peacefully" on Friday.
Lucky was found with serious injuries in the village of Lanchester, about 10 miles from her home.
As Ms Clennell had no pet insurance she set up an online campaign on Thursday in an attempt to cover vet's bills.
Donations had reached more than £8,000 by Friday evening, which Lucky's owner now intends to return.
"Unfortunately due to the extent of Lucky's injuries, well over 50% burns to her body, with treatment that she would probably not survive she has had to be put to sleep as all we are doing is prolonging her agony," Ms Clennell wrote on the fundraising page.
"She went peacefully and I have requested her ashes.
"I would like to thank everyone for their donations and words of support."
Ms Clennell had previously said that Lucky had extensive injuries, including burns to her mouth and throat, as well as wounds to her head, ears and torso.
She had suffered "secondary infection and organ damage" and was transferred to an emergency veterinary surgery for 24-hour care.
Det Insp Daniel Peacock of Durham Police said he was confident there was "no wider threat to other dogs".
"[The attack] is not linked to theft of dogs for purposes of breeding or sale," he added.
"Our investigation into this horrific incident is ongoing and we would appreciate anyone who may have seen something to come forward and speak to us.
"We understand how impactive incidents like this are and are asking for information from our communities to assist the investigation and bring the offenders to justice."
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Durham Constabulary
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