BOCA RATON, Fla. -- Two Boca Raton sisters said they bit into some candy bars this week and surprisingly got a good dose of protein. They said they were trying out the new candy called M-azing, but ended up getting maggots.

Monica Castanheeira said she bought some M-azing chocolate bars Tuesday night to enjoy while watching videos with her sister, Renee, and her 4-year-old neice.

Castanheeira said she took a big bite and then felt something moving in her mouth.

"I look on the table and on the chocolate, and there's a maggot walking around," she said. "It's really disgusting."

The sisters said they found maggots in each of their chocolate bars. They said they found some that were very small and crawling and others had yet to hatch.

The sisters are so sickened, they went to the emergency room. They said the child is convinced there are bugs walking around in her stomach.

"We're investigating, obviously," said Master Foods USA, the producer of the chocolate. "And we're really sorry. Maggots are a result of fly larvae and could happen in a matter of days after our products have left our factories."

"When I think about it, I still feel it on my tongue," Castanheeira said. "I can't eat chocolate no more."

Castanheeira said she bought the candy at a Shell gas station. She said all the candy is off the shelves because she went back and bought it all to see if it was infested.

A state health investigator has been assigned to the case and will check out the candy bars as well.