A pair of Georgia cops killed a family’s dog and forced them to saw off the beloved pooch’s head with a knife or face arrest, a bizarre new lawsuit claims.

Joe Goodwin and wife Tosha Dacon say Crawford County sheriff’s deputy James Hollis got an itchy trigger finger and blasted their 2-year-old pet Big Boy when the deputy was on a routine call at their house on Dec. 1 — then fellow deputy Wesley Andrew Neesmith made them behead the pet, the Atlanta Journal-Constitution reports.

“Under extreme emotional duress and distress, and under threat of incarceration and physical harm, Plaintiff Goodwin was forced to decapitate the dog with a knife,” a lawsuit the couple filed states.

The poor man had trouble finishing the grim task and wife Dacon had to help him, the suit claims.

Rabies tests can only be done via brain autopsy, and the cops say they wanted the head so it could be delivered to the health department.

Sheriff Lewis Walker, who is also named in the suit, argues his officers told Goodwin he could hire someone to do the deed, but Goodwin told the Journal-Constitution that he could not afford a professional and that he complied with the officer’s request to decapitate the pooch because he feared he’d be shot otherwise.

Goodwin claims he lost his job as a result of the “great physical and mental pain and suffering” and is suing Hollis, Neesmith, Walker and the county for $75,000.

Hollis was placed on paid leave amid an investigation, according to the Journal-Constitution.