it makes a growling sound
A growling sound.
Snarling and growling
Wombats make a low guttural growling sound.
Snarling and growling
it sounds like it really growling but it is and it roar!!
It turned out to be the alternator going bad. Replaced alternator. No more growling.
Platypuses make a soft growling sound. They do not quack, as they are not even remotely related to ducks.
jaguars make a low growling sound and sometimes a sound that sounds like a lawn mower
Horses are not capable of growling. They do not have the voice box structure to make that sound. If you notice that a horse seems to be making a growling noise all the time, it is likely stomach or bowel sounds. The horse is likely hungry.
gruñido gruñir = growling growling gruñir = growling
Its most likely because he does not know what the sound is and perceives it as a threat.