The dog definitely had a big bite but, it also had some big flames. During the second series of Robot Wars Extreme, Growler trialled a flamethrower to become a sort of projectile tail for the robotic dog. However, it didn’t work very well with it having zero effect on fights and was more for show than as a weapon. Plus, it was unreliable with Growler having technical issues throughout the series and the flamethrower was dropped for Series 7. In the history of Robot Wars, on Sergeant Bash and Growler have used flamethrowers, mainly through competitors not being allowed to use them or other projectile weapons.
If you want to see Growler in battle with his flamethrower, click here.