Why Do Dog Grunt. Or they could be communicating a need for attention or a warning. Sometimes, dogs will grunt when they are excited and this could be the reason why your dog grunts.
They may be communicating “keep going” or “stop,” or you could be pushing the air out of them or subconsciously reinforcing the behavior. If your dog always grunts when she's in rest mode, she might not even be aware of it. Adult dogs often grunt while being petted and ‘loved on’ by their family.
