Heyfield moved from sixth place on the ladder to fourth after a 140-point thumping of Glengarry.
The Kangaroos moved a game ahead of Sale City and TTU with their 26.16 (172) to 4.8 (32) victory.
Leading by 27 points at quarter-time, the visiting Kangaroos booted seven goals to one in the second term to be 64 points ahead at the main break.
Heyfield continued their dominance in the second half, adding 13 goals to one.
Jesse Bedggood kicked six goals for the Kangaroos, Mark Johnston four, and Mat Rodaughan and Matt Bedggood three each.
Matt Beddgood, Adam Wallace, Jack Woodland and James Conway controlled proceedings through the midfield, while Scott Anderson was again dominant at full back.
On a weekend of large margins, Rosedale recorded the biggest, defeating Gormandale by 161 points.
The third-placed Blues boosted their percentage with a 28.20 (188) to 4.3 (27) victory.
Brandon McDonald kicked seven goals, Hayden Bell four, Matt Royal four and Ben Jones three.
Alex Whitehill was best-on-ground, playing on the wing, while centre half-forward Frazar Brouns and centre half-back Brad Scott were also prominent.
Steven Burgess kicked three of the Tigers' four goals, with Jaryd Gilroy their best player.
Cowwarr narrowed the gap between it and the North Gippsland football top five with victory over Sale City.
The Saints won at Stephenson Park on Saturday 15.11 (101) to 11.11 (77) to move to within four points of the Bulldogs, who remain in fifth place on percentage, thanks to Traralgon-Tyers United's big loss to Churchill.
The Saints set up their win during the first half, when they were more efficient with the ball. The visitors led by 21 points at half-time before both sides kicks six goals in the second half.
While it had plenty of the ball, City wasted opportunities to kick goals in the first quarter, as the Bulldogs took time to adjust to the breeze.
Each side kicked a goal early, before Braden Johnston kicked a goal for Cowwarr after a teammate marked an errant Bulldog kick in defence.
Riley Johnston sent the ball to Sam Moran, whose kick found Shane Morgan, who kicked the first of his four goals for the day to give the Saints back the lead.
After a couple of misses by the Bulldogs, Ben Chivers goaled to put the home side five points in front.
A 50 metre penalty helped the Saints move the ball into their forward line, before Morgan booted a goal to give them a one-point lead at quarter-time.
Bulldogs coach Jacob Schuback lamented the effort of his players, saying at quarter-time they were "lazy", and needed to stick to their zones.
Wanting a four-quarter effort, Cowwarr coach Jeremy Jones wanted the Saints to continue sharing the ball.
The Saints began the second quarter strongly, with Morgan winning a one-on-one contest to take a mark and kick a goal in the opening minute.
A turnover in the midfield led to Morgan kicking another goal, giving the Saints a 13-point advantage.
The Bulldogs pegged the deficit back soon after when Nick Grainger kicked a goal after marking Josh Granger's kick.
A goal from Mathew Leicester put the Saints 14 points ahead.
The Saints finished the quarter better, adding three goals to one to take a 21-point lead into the main break.
Momentum swung the Bulldogs' way during the third quarter, when they kicked five goals to two, cutting the Saints' lead to five points at the final change of ends.
The Saints held off the Bulldogs' challenge in the final term, booting four goals to one to win by 24 points.
Best-on-ground Nick Szabatura and Will Runciman were strong in defence for Cowwarr, with the midfield led by Pat Tainsh and Andrew Cunningham punishing the Bulldogs' mistakes. James Chalmers was a danger in the forward line.
Chivers stood out for the Bulldogs, kicking two goals and working well with Brad McKay, Jacob Schuback and Jake Evans-Boulter in the midfield.
Centre half-back Josh Barton and half-back Abe Schuback also did well to get the Bulldogs back into the contest, while Kerrod Macgregor-Davies booted four goals.
Ladder leaders Churchill have firmed as favourites for the flag after a commanding performance against Traralgon-Tyers United at the weekend.
The Bombers were never in the contest, managing just two goals to half-time to the Cougars' 13 to stand a damning70 points in the red at the main break.
All the usual suspects were flying for the Cougars with Brendan Holt and Ben Kearns again patrolling goals for the visitors, finishing with four majors each.
Ben Skinner was equally damaging and scored three goals while Nathan Celima, Ryan Lowrie and Blake Slater grabbed two each.
Among the best for Churchill in the big win were Celima, Holt, Chris Williams and Jordan Fenech.
Hayden Willaton kicked three goals for the Bombers in the loss and Billy Morrison two.Latrobe Valley Express
Defending premiers Yarram made it eight wins on the trot at the weekend with a resounding win over Woodside.
Lukas Jenkins reaped the rewards for the Demons and booted five goals, Matt Scholz kicked four and Louis Rodaughan, Liam Farley and Griffin Underwood all added three majors each.
Ryan Foat and Izayah Speer kicked two each for Woodside.Latrobe Valley Express
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Yarram v Woodside and TTU v Churchill match reviews published by Latrobe Valley Express.
Gormandale v Rosedale, Glengarry v Heyfield and Sale City v Cowwarr match reviews written by David Braithwaite reporting for the Gippsland Times. To view original article in full online click here.