Princess Beatrice is mourning the death of her beloved dog Orange after he ate a mystery poison, according to reports.
The Norfolk Terrier returned from a walk in Windsor Great Park "distressed" and was rushed to the vets, The Sun states
However, no one was able to identify the mystery toxin and 30-year-old Beatrice made the heartbreaking decision last month to have the five-year-old put down, the newspaper adds.
Now fears have been raised over whether Orange was deliberately poisoned and if the Beatrice's four other Norfolk Terriers - Jack, Cici, Teddy and Ginger - are at risk.
“No one seems to know if the poison was a natural substance like a fungi, or if there is a dog-hating maniac on the loose," a pal told The Sun.
"Obviously Beatrice is keeping a close eye on her other pets.”
The tragic news put a cloud over Beatrice's New Year celebrations, according to the friend.
They added: “She’s loved up with Edo but couldn’t stop thinking about her dog. It’s very upsetting.”
Beatrice and her beau Edoardo Mapelli Mozzi looked smitten as they strolled hand in hand and felt the sand between their toes while on a beach in Lamum, near Kenya.
Beatrice, dressed in a black swimsuit and sarong, was later seen flinging her arms around the 35-year-old and chatting 'animatedly' to Edo's mother, according to onlookers.
The pair arrived on the Island shortly after Christmas and were joined by family and friends.
On New Year's eve a beaming Beatrice was seen dancing on a hotel bar after the clock struck midnight.
The secluded tropical location is where Edo’s family owns a luxury coastal estate - and where he is said to have proposed in 2015 to his ex and mother of his child, Dara Huang.
They had also planned to marry there, according to reports.
However, his romance with the successful architect is understood to have crumbled earlier this year.
Beatrice's relationship with Edo, was revealed in November, leaving Dara's mother 'broken to pieces.'
He was reportedly still living with Dara and their son when the relationship with Beatrice began.
He popped the question to the 37-year-old three years ago and together they have a two-year-old son named Christopher 'Woolfie' Woolf.
However, their split and Edo's new relationship with Beatrice left Dara's mother Lily, 69, heartbroken.