Harvey's women's side kicked off its 2019 South West Football League campaign with a 47-point thrashing of Bunbury.
The Bulldogs beat Harvey to claim the 2018 SWFL Women's premiership, before the Bulls knocked Bunbury out of this year's Brooke Fiore Hair and Tanning Pre-season Carnival.
Playing at home on Saturday, the Bulls moved out to a nine-point lead at the first change.
Keeping Bunbury scoreless in the second term, Harvey extended its lead to 31 at half time.
After leading 6.8.44 to 1.1.7 at the final change, the Bulls went on to crush the reigning premiers - 7.12.54 to 1.1.7.
Two goals to Rennie Sansom saw Busselton score a seven-point win over Harvey-Brunswick-Leschenault at Bovell Park.
The Magpies led by three points at quarter time and kept HBL scoreless in the second term.
Booting four goals in the first half, Busselton earned a 4.0.24 to 0.3.3 buffer at half time.
The Lions narrowed Busselton's lead in the third term, before booting two more goals in the fourth.
The home side held on to claim a 6.0.35 to 4.5.29 victory.
Collie opened its account with a convincing display against Eaton on Sunday afternoon.
With the scores tied at quarter time, the Eagles moved ahead by five points in the second term.
Booting five goals to two in the second half, Collie celebrated a 7.4.44 to 3.3.21 win.
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