A dog owner in Colorado is distraught after learning her beloved pet was mauled to death while in the care of a dog sitter she found on an app.

“Got along with cats and dogs and people and just wanted nothing more than to sit in your lap,” dog owner Elaine Conoly said.

Conoly never got to say goodbye to her dachshund, Wally.

“I mean he was supposed to turn 10 next month,” Conoly said. “I don’t get those years now.”

While on vacation for the Fourth of July, she used a popular dog sitting app–Rover.

It allows dog owners to search and request pet sitters, a dog walk, and even overnight care.

The sitter Elaine used had watched both her dogs one time before.

Two days into her vacation, she got a message from the sitter

“Saying, ‘Sorry, a mastiff completely mauled your dog and killed him instantly,'” Conoly said.

Elaine says another dog, unbeknownst to her, was at the sitter’s home and attacked Wally.

“He didn’t need to be outside, near a 150-pound dog,” Conoly said.

Since that day, she says she hasn’t heard from the sitter and can’t find Wally’s remains–after he was left at a pet hospital.

As for Rover, Elaine says she still had to pay for their services, and since an initial email apologizing, nothing else has been done.

After CNN reached out, the company’s PR spokesperson says the company is distraught and has opened an investigation and remains committed to supporting Elaine.

The sitter is no longer working with Rover.

But that’s a little too late for Elaine. She’s pressing charges and is hiring an attorney.

She hopes others learn from her tragedy.

“Truly, it was like having my heart ripped out of my chest,” Conoly said. “You can’t replace 10 years of memories. I just want them to be just held liable for their actions. They are falsely advertising to people.”