The feature match of the week at Teimurimotia Park on Saturday saw the Eels putting on a dominant performance against the struggling home side.
The win was a perfect revenge for the Eels, who were dumped by the Bulldogs in the competition final last year.
Under the guidance of new coach Terry Piri, Eels scored three unanswered tries from some brilliant set-piece play in the opening spell to lead 14-0 at the break.
Bulldogs had some opportunities to cross the whitewash but were unable to pierce through a defiant Eels defence which stood tall in some crucial moments of the match.
The visitors started the second spell on a high, scoring a try to extend their lead to 18-0 but the Bulldogs found their way back with consecutive tries to make the match an interesting one.
The final 10 minutes proved a tense affair with Bulldogs throwing their bodies on the line in an attempt to level the match.
But indiscipline and lack of concentration helped the Eels seal the 28-10 win with two well-worked tries in the dying stages of the match.
In the other premier match over the weekend, Arorangi Bears survived a scare against the Aitutaki Sharks after a close 20-10 win in Aitutaki on Friday, while the Ngatangiia Matavera Sea Eagles defeated TKV Warriors 38-18 on Saturday.
It was a well-fought comeback win for the Sea Eagles, who were down by 18 points in the final 20 minutes of the play.
Premier: Aitutaki Sharks 10 v Bears 20, Warriors 18 v Sea Eagles 38, Bulldogs 10 v Eels 28. Under 19s: Bears 28 v Sea Eagles 22. Premier Reserves: Panthers 42 v Warriors 6, Eels defeated Bulldogs (score not provided).