There’s a new narcotics dog on the sheriff’s force.

On March 5, Bristol County Sheriff's Office K9 Officer Brennan Bulgar and his four-legged partner Eros (a two-and-a-half-year-year-old Shepherd), graduated from the narcotics detection program.

According to a press release, along with fentanyl, the young Shepherd can detect heroin, suboxone, oxycontin, crack, cocaine, meth, Percocet and marijuana. Bulgar said that of the nine drugs they worked on, fentanyl was the one where Eros shined the brightest.

"He was picking up on very trace amounts of fentanyl," Bulgar said. "He can hit on five milligrams — it’s like a speck of dust, but that's enough for Eros. He's really been great and will do an amazing job for the people of Bristol County."

Sgt. William Dillingham led the detection program for Officers Bulgar and Eros, and said that fentanyl detection was a top priority.

According to the sergeant, one of the biggest challenges of the academy was teaching Eros about a “passive alert” rather than an “aggressive alert.”

"The last thing we want is the dog to scratch at a bag of drugs and have it tear open and get in the air," Dillingham said. "That's not good for the dog or the handler, or anyone in the area.

He added that if the newly certified dog deputy detects drugs, he will sit at the spot rather than claw at the area.

“The passive alert was a big challenge, but Eros did great at it,” Dillingham said.