That's because they have keep the family secret under wraps, or be persecuted like witches, or worse; become lab experiments. However, that doesn't stop them from wolfing out during the full moon, or when they get angry sometimes.Both Scott's girlfriend and his scheming best friend are the only ones who know about their secret. The grandparents tend to let their wolfish forms hang out all the time in the house, with or without the moon's help.
The grandfather always tries to chase the neighbor lady's cats next door, and she is always trying to snoop and spy on them. She suspects something strange is going, and thinks one day she'll expose the truth. Lupey, the younger sister in the family is always wanting to become a werewolf, but she is just a child; and she has to wait until she is in her mid-teens. She makes up for it by wearing a werewolf costume and plastic fangs, and running around howling.
Though many fans of the original movie might disagree, I think this is a vast improvement on the movie of the same name, with the addition of these characters. The show also has the crappy high school bully and his stupid girlfriend, who are always trying to make Scott look bad. Together, the whole family and friends have exciting adventures, with comedy in tow. I recommend showing this to your kids, over some of the garbage on CN and Nick Toons are currently showing. 10/10 stars!