Its most likely because he does not know what the sound is and perceives it as a threat.
A noise coming from the back of the throat, like the growling sound a dog would make.
A 2006 Kia Sedona will exhibit a growling noise from the engine if the serpentine belt is loose. It can slip against the pulleys and produce a persistent growling noise.
a dog can protect its home by barking or growling if anyone comes
If the dog is familiar to you you may bare your teeth and make the growling noise; often a dog will mimic this motion. You must, however, be careful if the dog is violent it may attack you.
my dogs does but its more of a weird growling type of noise.. he is a pitbull/mix with longer hair also
Look that dog is Growling. He does not like you.
A person should never confront a growling dog. If there is no way out of it, turn your back to the dog and say no.
growling
The easiest way to fix a low growling noise in a 1997 Ford Aspire might be to add Lucus oil stabilizer to the oil. This will depend greatly on where the low growling noise is coming from and it might be even easier to first have a mechanic pinpoint the noise.
Take it to a vet or a dog physiologist
a dog can see ghost's, so he might be growling at one telling it to get out. but if he is growling at the ceiling, he might be playing.
Snarling and growling