Two men have been charged after death threats were allegedly made to NSW Deputy Premier Troy Grant over the state government's decision to ban greyhound racing.

A third man has also been charged over a separate incident in which a series of allegedly intimidatory Facebook posts were made towards Mr Grant, who is also the police and racing minister, over the weekend.

Threats were made to Deputy Premier Troy Grant's office last week. Credit:Dallas Kilponen

Police will allege at least three threatening phone calls were made on Friday to Mr Grant's Dubbo electorate office.

In the first call a man allegedly told a member of Mr Grant's staff: "I'll burn your house down."