Robert Irwin has shared the sad news that his beloved dog Stella has been diagnosed with cancer while he's been away competing on "Dancing With the Stars."

The Australian wildlife conservationist and " DWTS" phenomenon posted on Instagram on Oct. 12 that his adorable pug underwent surgery after a cancerous mass was found.

"This is a tough one," he wrote. "I wanted to give an unfortunate update on my sweet little pup, Stella. A mass was discovered that ended up being cancerous. We still don’t know the full extent of the cancer. I have faith she’ll be in the clear. She is such an important part of our little fam, so it’s been stressful to say the least being away from home and away from her while she goes through this."

"I know you guys love seeing her and I love sharing her with you

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