Canterbury prop James Graham will plead not guilty to a biting charge at the NRL judiciary on Thursday night.

Graham was on Monday charged with an ungraded dangerous contact offence for allegedly biting the left ear of Melbourne fullback Billy Slater in Sunday's grand final loss to the Storm.

The issue was deemed serious enough to be referred straight to the NRL judiciary.

But by choosing to plead not guilty on Wednesday, Graham is not eligible for the 25 per cent reduction on the final penalty, should he be found guilty.

Graham is in danger of copping a hefty suspension of up to three months which could rule him out for the first 10 rounds of next season.

On Tuesday Bulldogs chief executive Todd Greenberg admitted the footage of Graham's alleged attack on Slater was "damning".

"It's difficult obviously because the pictures are quite damning," Greenberg told Triple M radio.

"... James has been absolutely outstanding for us in 2012.

"I would put him in such a high class of of footballer, he's a wonderful guy, he's done a huge amount of work for us in the community and he's just a good quality human being."

Graham's dangerous conduct charge was the most serious to come out of a spiteful 25th-minute melee which led to three players being charged for fighting.

Melbourne pair Sisa Waqa and Todd Lowrie and Canterbury's Josh Reynolds all accepted early guilty pleas, with the Storm duo to serve one-match suspensions in next year's trials and Reynolds escaping suspension.