In the 1980s the Bulldogs had the most feared pack in rugby league, and with three blue-chip forwards recruits, all signs points to a return of the "Dogs of War".

It is as impressive a lineup as there is in the NRL - a pack that already boasted skipper Andrew Ryan, NSW hooker Michael Ennis and workaholic backrower David Stagg has added three of the competition's best.

New Zealand internationals Frank Pritchard and Greg Eastwood were signed up at the same time that up and coming prop Aiden Tolman committed himself to the club's future.

"On paper it looks pretty good doesn't it?" Stagg told AAP.

"You probably hear the same things from teams every year but it's definitely exciting times obviously with the recruits that we have got and the new guys are certainly going to add a little bit more punch for sure.

"It's only pre-season at the moment but the boys are fitting in really well and hopefully we can sort of get a pack on the field injury free and hopefully put a bit of a dent into the opposition.

"A game hasn't even been played, but hopefully we'll come together ... It's a matter of now waiting until kick off comes around and getting into it.

"Once we get everyone there it's going to be some sort of pack."

New recruit Tolman agreed that the club had bought well to complement the hard nosed culture that has surrounded the bruising "Dogs of War" packs of the 1980s.

"We've bought well but that doesn't count for anything once you start playing," he said.

"We've still got to work hard and prepare well and come together as a team.

"The new guys have got to look to the older guys who have been here for a few years, like Andrew Ryan who is the rock behind the side.

"We have been brought in to improve the team, so we have to learn from the senior guys and build on what they have done in the past."

Pritchard, whose explosive running helped make Penrith the most deadly pack in 2010, said he saw similarities between the two engine rooms.

"I've had a good pack with the Penrith boys over the years, it's kind of funny at Penrith we played `the intimidation game', wanting to be the biggest pack," he said.

"And I've always been in big packs, but I come here and it's no different - it's just as big and has a lot of experience."

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