Khloe Kardashian's Dog Gabbana 'Euthanized Immediately' After Cancer Diagnosis

Khloe Kardashian's beloved dog Gabbana died this Tuesday, January 30, after vets discovered a deadly tumor in its belly.

"Gabbana was taken to the hospital in Westlake and was transferred out with a cancerous tumor in its stomach," a source close to the situation exclusively told RadarOnline.com. "She was euthanized immediately because there was no hope of beating it at her age."

"She was the sweetest black lab," added the insider.

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Khloe, 33, took to Instagram to mourn the death of her precious pup after its tragic passing.

"Last night my sweet Gabbana passed away," wrote Kardashian in her sad post. "She was more than a pet. She was my first child, my companion and my friend. She was incredible! She made sure I was never lonely even during lonely times. The house will never be the same. I never thought I would be this devastated over loosing sic a dog but 14 years, is a long time together. She filled a significant role in my life and I'm forever grateful. I love you Goober!! I'll remember you always!"

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Sister Kendall Jenner also voiced her sadness over the 11-year-old dog's death, writing on Instagram: "I'll miss your kisses forever Gooby. I know you're up there swimming, little fishy."

Gabbana was known for her love of water and swimming. She often accompanied the Kardashian-Jenner sisters on beach trips and midnight walks along the shore.