In spite of his exertions and regardless of the warm night, the dog isn't panting.

Flanks heaving, the dog panted loudly, but never took its eyes from Alfred.

One dog panted loudly, its tongue hanging out.

Another dog, one of the Labs, would have been panting by now, slowing after running hard in the warm sun.

The dog was panting hard, his tongue out.

The dog panted, softly, regarding the world calmly through the windshield.

The dog panted happily and chased down the ball.

The dogs had collapsed a foot away from each other and were panting like little steam engines.

The dog was panting, exhausted from its excitement.

The dog panted constantly in the heat, and Hal began to wonder if the greyhound could keep up for long.