hi..im surfing the net to help my friend find a solution to her dog problem and luckily i found this terrificpets.com. My friend has a 2year old shih tzu named bianca. A month ago she was stud of course by a male shih tzu!hehe.. and now bianca is 1month pregnant, samtyms she has been vomiting. she trowing up food eaten. is this normal for a pregnant dogs? or a signs of underlying disease? or maybe a morning sickness? hoping u can help my friend and give us some advice. thank you.