Bunbury has gone undefeated throughout the home-and-away season.
The Bulldogs booted five goals in the first half against Collie, before running rampant and kicking another seven in the second.
Casara Hill slotted four, while Kloe Bassett and Shanice Hill kicked three apiece, in the side’s 12.8.80 to 0.0.0 win.
The Eagles were effective around the ground, but could not convert their opportunities.
South Bunbury’s women’s team remains Bunbury’s strongest competition ahead of the finals.
On Saturday, the Tigers headed to Bovell Park for a tight showdown against Busselton.
Trailing by six points at quarter time, the Magpies responded with the game’s first goal.
Busselton’s second goal then gifted them a 2.0.12 to 0.10.10 lead at the final change.
South Bunbury upped the ante and turned a two-point deficit into a 2.10.22 to 2.0.12 win.
Busselton placed fifth after 18 rounds and narrowly missed out on a finals spot.
Harvey Bulls’ women’s line-up will represent the club in this year’s finals series.
The team picked up a convincing 4.4.28 to 0.0.6 win over Eaton on Sunday.
Having kicked two goals in the first quarter, the Bulls slotted one more in the second and another in the third.
Although close, Eaton’s attempts failed to fly through the goal posts.