The 16-year-old girl, identified as Vitoria Muller, from Brazil, is accused of microwaving her pet after being encouraged by friends to do it, according to local reports.
Authorities said they seized the animal and transferred it to a vet to be seen to.
Despite the distressing ordeal, the vet said the guinea pig was not injured. It was not returned to the girl or her family.
He said: “My daughter was already punished for her bad behavior. The animal is fine and in the name of all my family we apologize.
The dad added: “We all take care of animals in this house and we would never let something like this happen. We apologize again for all that happened.”
WHAT KIND OF CHILDREN AND ADOLESCENTS TORTURE AND KILL ANIMALS FOR AMUSEMENT?
One user wrote: “I cannot believe she was cooking the poor animal”.
Another added: “What a b***h. Abusing a small animal like this… only to get more followers.”
The girl has since deleted her social media accounts following the backlash.