Josh Jackson will fly to Port Moresby with the Prime Minister's XIII squad on Thursday, still stunned by Canterbury's decision to sack coach Des Hasler earlier this week.

The Canterbury back-rower admits he was shocked to hear Hasler had been removed from the Bulldogs post, and not been given the opportunity to serve out the two-year contract extension he signed five months ago.

Outgoing Bulldogs captain James Graham said on Tuesday that sacking Hasler after six seasons was the wrong call, while it is understood the coach's removal from his post could lead to legal action.

Jackson tried contacting Hasler on Tuesday night before flying to Cairns en route to Papua New Guinea where the Prime Minister's XIII will play the Kumuls on Saturday, but hasn't heard back from his former mentor.