Yes. We Do. And at the police and fire sirens. I don't know how to describe it but my boy and I go out on occasion and howl together. Our little girl looks at us like we are crazy and she only barks (maybe her howler is broken?) but our big boy LOVES to howl. At the moon, with my wife and I, at sirens, and during certain Enigma and Enya songs. Anything with a deep bass or choral/choir sets him off. It's like he wants to sing along or something...