Our dog will howl along with some of the emergency vehicle sirens. Remarkably similar to the particular siren that is sounding outside. (We live on a 4 lane parkway an easy walking distance from a major hospital, so we get different sirens from many different jurisdictions. She'll sing (edit: said sign before) along or in back-and-forth with about 1/3 of the distinct sirens.)

She also can sign? That's amazing!

The comment history of this username really checks out!

I take zero offense and thank you for the correction, but it's somewhat amusing to think that someone presumably has two accounts and switches between them to make comments when a post is inadequately proofed.

dogs sign walls and trees all the time