A woman was left shocked and heartbroken after her beloved and healthy dog's health suddenly deteriorated due to an autoimmune condition.

Kassidy Ciarrone, 28, an engineer from Indianapolis, told Newsweek that Jango, her 6-year-old mixed-breed dog, had enjoyed a normal evening on June 2. The next day he was lethargic and didn't want to get out of bed.

"We didn't think much of it, maybe he was just extra sleepy after a long weekend," she told Newsweek . Her husband mentioned that Jango had skipped breakfast , which was unusual given his normally ravenous appetite.

"I got home from work, and usually Jango is meeting me at the door and jumping on me. He barely lifted his head off his bed and I knew something was really wrong," she said.

After checking his gums and noticing how pale

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