A certified service dog went missing in Dallas while in the care of a Rover pet sitter. More than a month later, the pup's owner is still holding out hope that she'll be found alive.

"Every day, I do something to continue her search," said Anna Lazareva. "We make fliers and posters."

Lazareva's desperate search continues for her beloved 12-year-old certified service dog, Bonya.

"I got her when she was three months old," said Lazareva. "We were moving a lot during the last 12 years to different countries and three different cities. She was always with us every step of the life."

Lazareva booked a stay at a dog sitter's house on the Rover app while she visited her home country of Russia with her son.

"I found out that my dog escaped the backyard," Lazareva said. "There was a hole in the

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