Recruiting manager Simon Dalrymple says the Western Bulldogs are yet to decide how high they're prepared to go for father-son Draft nominees Tom Liberatore and Mitch Wallis.

Childhood friends Liberatore and Wallis were team-mates in last month's Calder Cannons under-18 premiership side.

Their fathers Tony and Steve respectively are former Western Bulldogs players.

Jacob Brennan has also been nominated.

The 20-year-old East Fremantle defender is the son of two-time West Coast premiership player Michael Brennan.

The bidding meeting is on Tuesday at 10am, before the start of Trade Week.

If a bid is made, the club that nominated the father-son player must use their next available selection if they want to retain their hold on the player.

It's likely the Bulldogs will have to give up picks 22 and 41 for Liberatore and Wallis.

Wallis captained the Vic Metro under-18 team in 2010 and the Morrish Medallist gathered 47 possessions in Calder's TAC Cup grand final win over Gippsland.

"We haven't made a final decision yet," Dalrymple told AAP on Friday.

Dalrymple said the Bulldogs would discuss tactics on Monday ahead of Tuesday's bidding meeting.

"We've got a final meeting as to how high we're prepared to go," he said.

"Everyone rates the talent pool differently.

"We're pretty well off for inside midfielders. But if they're the best players, we've got to go with the best players.

"You can't have too many good players."

Dalrymple said it was "nice" that the pair had strong family histories with the club but it wouldn't be a crucial factor.

"You can't base your decision-making on those sorts of things. We're really trying to base it on their playing ability and their characters," he said.

Brennan averaged almost 16 possessions per game for East Fremantle in 2010 after struggling with injury the previous year.

Michael Brennan says his son has been a bit of a "late developer".

"He was never in any representative sides or anything like that.

"It's been good because he's had a few hurdles to overcome," Brennan Senior told the West Australian newspaper last month.

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