Janelle posted that after dealing with an unexpected illness, her pup Jack passed away.

Sister Wives star Janelle Brown updated fans with a heartbreaking post about her four-legged

family memberCredit: TLC

Janelle posted that her dog Jack has passed away after an unexpected illnessCredit: Instagram/ @janellebrown117

The reality star posted several photos of her adorable brown Terrier to her Instagram and confirmed her sad news.

She wrote in the lengthy caption: “My sweet Jack passed away this morning. Thanks to the vets Canyon Pet Hospital who worked so hard to save him these past few days but sadly his body just couldn’t overcome the disease that struck him suddenly late last week.

“Jack was my mom’s dog that we took in after my mom’s passing a couple of years ago. But he wasn’t a stranger to us.

“I was with mom when she adopted him and he spent many months each year staying with us when mom visited. We had a special bond before he came to us full time.

Sister Wives’ Janelle Brown reveals beloved family member is ‘sick’

“He will be really missed. My other pup Bryn is a little lost. And our hearts ache. But I am glad he is no longer suffering,” she wrote.

The Sister Wives star posted an upsetting photo of her family member last week.

She uploaded a heartbreaking photo of her sweet Jack laying next to her on a bench.

The pup clearly was not feeling his best when the photo was taken, and the TLC star said she took him to the animal urgent care.

In the photo, the adorable pooch is laying on his side with his feet up against his mom and his head hanging off the bench.

Janelle captioned the photo: “Waiting at veterinary urgent care. My buddy Jack is pretty sick.

“It’s like being with my human kids, same worry it’s something serious.”

Janelle’s loss comes at a time when the reality star has gotten her own health under control and lost over 100 lbs.

WEIGHT LOSS JOURNEY

Janelle recently posted a new clip showing off her slimmed-down figure.

She posted to her Instagram grid yesterday and posed in a form-fitting dress while she shared part of her weight loss story.

The mother of six proudly displayed her dramatic weight loss as she counted to four along with the sound of the vid.

The text on the video read: “Why I started Plexus…” and gave four reasons.

The reasons popped up one by one, and revealed: “Rid my sugar monster, reduce brain fog, reduce inflammation, and lose weight, gain energy and so much more!”

Janelle’s caption expanded further into her weight loss journey.

The Sister Wives star wrote: “It wasn’t overnight and I’m okay with that. Slow and steady wins the race. The best advice I can give you is, just start.

“Create your ‘day one’ because ‘one day’ will always come and go. Give it your all, be consistent and I can guarantee you’ll be pleased! I know I am!”

The lifestyle devotee then invited fans to join her community: “Join our Spring Challenge! Message me SPRING INTO ACTION if you’re ready! Also, check out my health page @life_with_health_and_happiness.”

Janelle’s health page documents her use of plexus and invites followers to purchase it from her.

Plexus, also known as “the pink drink,” is a powder supplement that’s mixed with water and serves as an appetite suppressant for weight management.

The 53-year-old has officially launched her own weight loss business surrounding the supplement.

LIFE AFTER KODY

Janelle’s huge life changes came after her marriage breakdown.

The U.S. Sun reported last year that Janelle and Kody, 53, were no longer together after 29 years of marriage.

A source said: “She’s no longer claiming to be his wife.

“She does not believe she’s part of the equation of marriage with Kody anymore. It’s done, it’s over,” the source said.

Some fans have voiced their concern that the divorces between Kody and his ex-wives might hurt the show unless the famous family got “back on track.”

The reality star explained Jack became hers after Janelle’s mother passed awayCredit: Instagram/ @janellebrown117

Janelle recently shared positive news to her social media, losing over 100 lbsCredit: Instagram/ @janellebrown117

Janelle and Kody broke off their relationship after 29 yearsCredit: Getty