High-pitched and repeated – a playful bark usually served as an invitation.
Rapid barks with pauses- something is wrong i.e they sense intruder.
Continues barks lower-pitched- a dog that can sense imminent problem.
Single high pitched- a painful yelp and expression of pain.
Single medium- pitched bark- a dog wants to be left alone.
Single barks with long pauses- a lonely dog calling for attention or company.
One or two short medium-pitched barks usually a greeting sound.
By Rhona