The quality or state of being doggish; dog-like characteristics or behavior.
From doggish (adjective) plus the noun-forming suffix -ness (the state or quality of being something), like 'happiness' or 'kindness'.
The suffix -ness is one of English's favorite tools for turning adjectives into abstract nouns—'doggishness' captures an entire attitude, like when someone shows stubborn loyalty 'with pure doggishness'!
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