How do purebred Collies reportedly communicate needs to their owners?

Answer

They are often vocal, 'talking' with grumbles or barks to communicate needs

Purebred Collies are known for being quite vocal, often using grumbles or barks, described as 'talking,' as a means to communicate their needs to their owners rather than only barking at outside stimuli.

How do purebred Collies reportedly communicate needs to their owners?
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