Atley Gringorten snapped a 2-2 tie, netting the game-winning goal midway through the third period as the Bulldogs trimmed the Sons 3-2.
Dominik Godin and Keenan Castle scored in the second period for the SMHA crew, with Riley Lavallee and Ashten Lachance countering in a losing cause for Nickel City.
The Bulldogs are taking part in the Orangeville Early Bird Tournament, battling the TNT Tornadoes, Stouffville Clippers, Orangeville Flyers and Centre Wellington Fusion in round-robin play, with the top two teams meeting in the championship final on Sunday.
The Sons, meanwhile, are heading to Niagara Falls, part of an eight-team Minor Atom AA division competing at the Garden City Early Bird Tournament. The Sons face the Ted Reeve Thunder, Brampton 45's, Ancaster Avalanche and Halton Hills Thunder, needing to finish first in their three-team pool to earn a berth in the gold-medal affair.
The Jr. Sons will be joined at the tournament by the Nickel City Novice AA Jr. Sons, Copper Cliff Minor Atom A Redmen and Nickel City Bantam A Hitmen.