Another thing is if you wanna snarl, its kinda the same as the growl-bark, but emphasise the 'bark' part and continue the growl as is! :3
i figured out how to growl a bit better! I just have to bring the sound a bit farther forward in my mouth. When it’s too far back it sounds more like a purr, which isn’t very threatening. Too far forward, and it’s a chihuahua’s growl. Also, baring your teeth brings the sound further up. another fun thing is the growl-bark! A QUITE threatening noise, you just have to bark silently while growling, so that the growl comes out in a short, sharp bark. if it’s difficult at first, try growling, and then opening your mouth while sustaining your growl. Then, just open and close your mouth quickly, to 5 the growl-bark!