In writing, you substitute a dog-like image or characteristic of a canine in place of the actual animal: In other words, you imply an object without actually stating what it is.
For example: A flash of tan fur brushed past me, in hot pursuit of a blue rubber ball.
i believe it's a metaphor!
You must find a simple metaphor to use.
That dog can hunt is a metaphor for He is good at something
The dog's bark was a piercing siren in the quiet night.
Not sure :-) Hope I helped!
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(example A dog is a butterfly)it is saying something about a dog what is not true.Or it look like something
A barbecue is an incinerator.
Metaphor
wolf is you
Winston Churchill's Black Dog was a symbolic metaphor for his depression.
Metaphor