Pat Miller, CBCC-KA, CPDT-KA, says there are generally six types of sounds dogs use to vocally communicate with humans or with other canines. She shares ideas about what the dog sounds might mean and how to decipher the different noises dogs make.
Source: Whole Dog Journal, July 20, 2011. Link.
Barks, growls, howls, whines, whimpers, even dog purring . . . dog sounds have different meanings.”