Former "The Real Housewives of Atlanta" star Kim Zolciak took to Instagram on Monday to announce that her family was forced to put their dog Chanel to sleep, WetPaint reports.

Although the mother of six did not mention the reason for putting Chanel down, she did express her devastation and sadness towards making such a difficult decision.

Zolciak described the decision as "one of the hardest days of my life" and she revealed that she had Chanel for over a decade prior to putting her to sleep.

Zolciak posted a photo collage of Chanel and another photo of her husband Kroy Biermann saying goodbye to Chanel via Facetime.

Check out the heartfelt photos below.

One of the hardest days of my life today! We had to put our "little fur ball" Chanel down. We had her almost 12 yrs! My heart is so broken.

A photo posted by Kim Zolciak-Biermann (@kimzolciakbiermann) on Oct 10, 2014 at 12:15pm PDT

Following Zolciak's tribute posts to her late dog, her fans flocked to her Instagram page to send their condolences.

"Prayers to you and your family as you grief the lose of your fur baby Chanel!Please know this: Barking, Playing, and endless run Chanel is up in Heaven having fun!! Chanel has left paw prints on your hearts forever! R.I.P. Chanel," Instagram user @wheels4legs wrote.

"So very sorry for the loss of your family member," another user, @sc173, wrote.

A day after putting her dog down, Zolciak posted another Instagram photo of herself video chatting with her husband and drinking margaritas with her friend Jen while still coping with the loss of Chanel.

"So thankful for good friends!!" Zolciak wrote. " I really needed a margarita or two after yesterday!!"

Zolciak's daughter Brielle Biermann also expressed her sadness over the loss of Chanel via social media, Reality TV reports.

Check out Brielle's tweet below.

rip to the best dog ever, chanel!! 12/15/02 - 10/20/14