A Muttontown man violated a protection order and attacked his mother and the family dog, Nassau County authorities said.

Charged with felony first-degree criminal contempt, Daniel Arum, 26, was arraigned Tuesday in District Court in Hempstead. Bail was set at $1,500.

Assistant District Attorney Alex DePalo said in court that Arum got upset at about 9 p.m. Monday and “bit the victim, then bit the family dog.”

Arum, who has a bachelor’s in accounting from SUNY Old Westbury and most recently worked delivering pizzas, “became agitated for unknown reasons” and damaged his mother’s computer and a cable TV box, then bit his mother’s wrist, according to court papers.

Arum’s Legal Aid Society attorney, arguing for lower bail, said “no severe injuries were sustained” in the attack.

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Eugene Arum said his son has autism and — despite the protection order issued last September — lives at home.

“He gets very frustrated; he gets angry and lashes out,” the father said.

Eugene Arum said neither his wife nor the family dog, a white Maltese named Milo, was injured.