BOSTON (CBS) – Terisa Acevedo heard scratching sounds coming from inside her condemned property on River Street in Hyde Park.

WBZ-TV’s Diana Perez reports.

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It was nearly one month after a fire destroyed the multi-unit building.

The fire destroyed the home Feb. 23

Acevedo hadn’t seen her dog Lola since the fire on February 23. But, while returning to pick up some belongings Monday, she made a stunning find.

“We thought it was raccoon or something in the house,” Acevedo said.

But she soon figured out, that scratching sound was coming from Lola, her long-haired Dachshund.

Somehow, Lola survived not only the fire, but four weeks that followed, while locked inside that abandoned home.

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Doctors think she managed by drinking toilet water and eating scraps she found around the burned-out house.

“She probably was eating something in there,” said Dr. Megan Whelan, who has been treating Lola. “There’s some material on her x-rays, mineral-like material. So, she might have been getting into something in the house.”

WBZ NewsRadio 1030’s Lana Jones reports

That stretch included several nights of sub-freezing temperatures.

Acevedo immediately took the pup to Angell Animal Medical Center, where doctors went to work.

“Lola was brought to (us) last night and is currently being cared for in our Emergency/Critical Care Unit,” said MSPCA-Angell spokesman Brian Adams. “The veterinary team is performing several tests today to uncover the extent of her injuries. Lola remains upbeat given her ordeal.”

As of Tuesday, the dog appeared to be recovering. She was expected to spend one more night in the hospital before heading home.

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Acevedo was just overjoyed to have her pup back. “I’m never going to tell her no ever again. You want a treat? Here you go. You want to go out? Yes, sure. I’ll go out with you right now.”