Lola came into Season 4 weeks ago and now ever since her temperament seems to have changed she seems very quiet, sleepy and somewhat lethargic.  She is eating and drinking fine and looks very healthy.  Is this normal behaviour for a bitch after her first season?  Never had a bitch before so it is new to us.  Just getting a bit worried about her as she was very very lively!!!!

Sounds normal to me, they do tend to behave in strange ways. Mine get really clingy and quiet. Wouldn't worry.