ANDREW McCullough has warned his Broncos' teammates they must 'keep it going' as they get ready to face the vastly-improved Bulldogs.

The Broncos have been in great form, managing six wins and a draw from their last nine games to have them one victory away from cementing seventh spot for the finals.

But the Dogs have been in a purple patch of their own, their tight loss to the Cowboys last week their first in five games.

They reeled off victories over the Panthers, Tigers, Rabbitohs and Eels in that time, all teams that are in or around the top eight.

Their winning form has not gone unnoticed by the Broncos, said McCullough.

The Broncos will meet them in Sydney on Saturday night, with a win ensuring Brisbane a play-off place against either the Eels or Sea Eagles.

"They have been really good," he said.

"(Bulldogs' coach) Dean Pay has got them right back into the competition and they were a bit unlucky last week.

"They are a dangerous team, they off-load really well and have been defending well.

"Firstly and foremost we need to keep our momentum going against a team that doesn't have a lot to lose, so they can go out with a bit of a free attitude.

"We need to worry about ourselves and make sure we are working hard.

"We have been doing a good job of that over the last few months, so we need to keep that going."