Our lab Charlie, from time to time, will howl. The first time he did it, in the middle of the night, I thought it was the death knell; it was so creepy. Yesterday, we discovered if you start howling, he'll soon join in. Charlotte doesn't bark or howl, but she gets really excited.
So, as a family, we howl. :-)
As a side note, I had the hungries for the iced cookie cups they sell at the mall, so I made some...now I have two dozen...and I only wanted two. Poo.