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Photo from WFAA

FORT WORTH, Texas (April 30, 2014) – A Texas family said farewell to their beloved dog in October, only to discover months later that the veterinarian hadn’t euthanized him.

Instead, the family said, the vet kept the dog around for blood transfusions.

Sid, a 4-year-old Leonberger, was supposed to be put down last October because of health problems. But just last week, Marian Harris—Sid’s owner—received a call from a former employee who said Sid was alive in a cage at the Camp Bowie Animal Clinic.

Harris and her husband rushed to the clinic, where they said Sid was living in a cage in the back room. She said Sid walked out and jumped into the family’s minivan. A vet at a different clinic said he didn’t need to be euthanized.

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“The betrayal is so incredibly intense that nothing you have prepares you for the emotions,” Harris told CBS affiliate KTVT. “There’s anger, there’s joy that you have your dog back, there’s betrayal of this intense trust. And so it’s just really hard to camp on one particular emotion.”

Sid is now back home with the family.

According to ABC affiliate WFAA, pets were removed as evidence from the clinic Tuesday. Both local and state officials have launched investigations.