Updated: Feb 10, 2017 - 12:17 PM

Thousands of dog owners worldwide blame a popular flea killer for harming their pets.

Jim Strickland, a consumer investigator at our sister station in Atlanta, has obtained records showing dog owners believe the drug is connected to hundreds of pet deaths.

The medication is called Bravecto. It's a dog chew so powerful that one dose can kill fleas and ticks for three months. Pharmaceutical giant Merck says it's safe and effective, but the number of dog owners who think otherwise is growing.

"I believe that Bravecto killed my dog," Donna White of Buckhead, Georgia told Strickland.

When Strickland asked why, she said, "That's the only thing I changed his entire life."

In an email to Strickland, a Merck spokesperson said they've dispensed 34 million doses and that reports of serious adverse events are very rare, less than .01 percent.

We spoke with the FDA about how theyre handling the complaints and whether or not theyll take any action. Watch the story on KIRO7 News at 5 p.m. on Friday or online athttp://kiro.tv/LiveNews

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Dog owners blame popular flea medicine for pets' deaths - KIRO Seattle