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Dog Growling Low, Threatening Rumble

Cow Mooing Distant, Low And Muffled

Owl Hooting Once, Low Hoot

Alligator Hiss, Low Threatening

Low Frequency Vibration

Soft Kitten Purr Vibrating Low

Low Guttural Growl Followed By Silence

A Low Guttural Wolf Howl Fading

A Low Guttural Growl Fading Into