ANSWERS: 1
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Pregnant dogs tend to "show" between the sixth and eighth weeks of pregnancy (puppies are born in the ninth week after breeding). Some dogs do not show at all and have surprised their owners with puppies. A pregnant dog will shed her belly hair in preparation to nursing around 45 to 50 days after being bred.
Source:
Margaret H. Bonham, "The Compete Idiot's Guide to Dog Health and Nutrition," 2003.
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