Not explicitly about the Bulldogs but food for thought:

https://www.abc.net.au/news/2022-06-...less/101173828

Of particular interest:
Going ruckless seems to work best in a few situations. It seems to work well as a surprise tactic, especially in wetter conditions. This surprise factor can also help a makeshift ruck after an in-game injury.

Ruckless sides seem to have a real mobility advantage against slower primary rucks, and where they have ample other tall targets around the ground.
The best tap rucks present the biggest challenge to the strategy, as do the most mobile traditional rucks.