Trask Met Ms Topiary

On our way back from the ridge-run, we went by Ms Topiary. I had stopped there to try to catch pictures of the muddy dogs and their cool-off swim in the large pond. Topiary Girl is outside the fenced area thus the dogs had not formally met her.
As he turned to pose for me, Trask spotted her...

his unsure, aggressive pose upon approach was doused by Koyuk shaking off her swim.

Trask's pose is: wary of the green, shedding dog?;  flirting with Ms Topiary wearing her alluring Halloween headband? and/or...

 laughing at his mistake?