Credit: David Lynch: The Angriest Dog in the World - Wikipedia

(yes, that David Lynch)

The Angriest Dog in the World is a comic strip created by film director David Lynch.
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The strip was conceived by Lynch in 1973 during a period when he was experiencing feelings of great anger. First published in the LA Reader, the strip ran from 1983 until 1992. It was also serialised in the comics anthology Cheval Noir.

Must be a Chihuahua

Same.

I have no slack and I must scream

He’s so spiky