The Cats controlled proceedings throughout at Tatura Park, running out convincing 18.16 (124) to 8.6 (54) winners to secure an important early-season statement victory.
After an even start, Tatura struck first through Tim Wilson and Ben Darrou to level the scores, but Mooroopna quickly responded.
Goals to Kai Madgwick and Keelin Betson steadied the visitors before a late burst, including majors to Noah Williams and William Emanuelli, saw the Cats surge to a 5.2 (32) to 2.2 (14) lead at quarter-time.
Tatura showed early intent in the second term, with Ryan Young kicking a quick goal to spark the home side.
However, Mooroopna soon regained control, dominating territory and forward entries.
Goals to Xavier Chandler and Noah Williams were followed by further majors from Dan Tuddenham and William Emanuelli, allowing the Cats to extend their lead.
Mooroopna coach John Lamont said his side’s ability to build on its early momentum was key.
“We had a positive start in the first quarter and built a nice buffer, but we defended well and used the ball well. We were a bit inaccurate, but it was a really strong second quarter,” Lamont said.
“That set the game up on our terms and we were able to maintain that for most of the second half.”
The Bulldogs responded with their best patch after half-time, with Sean Johns and Sean McAllister kicking early goals to reduce the margin and inject life into the contest.
But Mooroopna again had the answers, with Jack Osborne and Keelin Betson halting the momentum before Tuddenham and Williams added further goals to steady the visitors.
Lamont said composure during that period was a pleasing aspect of the performance.
“Our focus was on bringing good effort and intent and seeing things through from stoppage to offence and defence,” he said.
“We didn’t get ahead of ourselves or overuse the footy, even when the game was on our terms.
“The Betson brothers through the midfield had a lot of influence.”
Leading by 51 points in the final stages, Mooroopna left little doubt about the outcome.
The Cats finished strongly in the final term, with goals to Jed Woods and Kobie Issell extending the margin, while William Emanuelli, Dom Gugliotti and Isaac Dowling also hit the scoreboard late.
Likewise, Tatura showed some resistance through Ryan Butler, who kicked two goals, but the result was never in doubt.
Lamont also praised his young forward group for their impact.
“They worked hard and were dangerous, which was really pleasing,” he said.
Mooroopna’s consistency across four quarters stood out, with Lamont highlighting the even contribution across the side.
“We were very level across the four quarters and a lot of players contributed, which was really pleasing,” he said.
Despite the strong result, Lamont said the group remained a work in progress.
“We’re still a developing group with a lot of youth, but we’re building towards a baseline performance we don’t want to drop below in terms of effort, execution and intent.”
Next up, the Cats will host the high-flying Shepparton, with the Bears looking to extend their 100 per cent record during the infancy of the new term.