Now she is trying to find out if there is any surveillance tape, either from the freeway or a nearby business, that may have captured the horrific incident.

"It's unfathomable. What kind of person would do this? I didn't think there were people in the world who would do this," said Savage, who was a supporter of the bill recently approved by the Utah Legislature making cruelty to animals a felony offense.

The action has outraged animal rights activists and pet enthusiasts and prompted the Humane Society of Utah to offer a $3,000 reward for information leading to the arrest and conviction of the person responsible. The outpouring of support since the incident has been overwhelming, Savage said.

"A lot more positive has come from it rather than negative," she said.

Enough donations from the public have come in that all of Seven's medical bills should be covered.

"I can't believe it. It's amazing," Savage said of the support.

The Utah Highway Patrol said it had few leads Friday. Anyone with information can call police at 840-4000.

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E-mail: preavy@desnews.com