Hardly howls?

  
Abby

Energizer Bunny
 
 
Barked: Fri Sep 21, '12 7:13pm PST 
My Abby is just under a year old and she's half Walker with the rest Beagle and a bit of Greyhound apparently mixed in. She has all the Walker personality traits - she trees small animals, jumps up on people, etc. But she hardly ever howls. Only time she seems to do it is when I'm playing a video of other dogs howling - she'll howl along with them, lol. She has a deep "warning/watchdog" type bark when she sees people walking outside, and she has a hysterical bay/chop bark when treeing an animal. But apart from that she really doesn't howl too much.

Is this common at all? I guess it could come down to the individual dog - some howl a lot while others really don't at all?