I Have A Shih Tzus ,How Long Do They Stay Pregnant?

Gestation in all breeds of dogs is same that is 59-68 days with an average of 63 days or 9 weeks. If your dog is pregnant then take care of her diet because her diet will be increased up to 25% during last 3 weeks of pregnancy. You should also take your dog to vet after 50 days of pregnancy for abdominal ultrasound to know liter size and any defect in puppies. This can help you in preparations for whelping. If you are not a professional breeder then I will advise you to get help from vet or professional breeder.

Approx 63 days.

Average gestation is 59 to 63 days though can be a little sooner (like 57) or later (70 and you need to call your vet). If you think your girl may be pregnant call your vet to find out when to start the testing and monitoring (ultrasound and x-rays are standard protocol). All breeding's should be closely monitored by a veterinarian (standard protocol) as so many things can and do go wrong and hopefully they are experienced with your breed and with whelp. You start your count from the first tie and begin taking temperature at the appropriate time.

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http://drnelsonsveterinaryblog.com/2009/01/01/canine-labor--when-to-call-the-vet.aspx?ref=rss