Early Signs of Canine Pregnancy. Part of the series: Canine Health Facts. The early signs of canine pregnancy include lethargy, impotence, decreased appetite and swelling of the nipple area, but appetite usually increases as the pregnancy progresses. Identify the symptoms of a pregnant dog with helpful information from a practicing veterinarian in this free video on pet care. Read more: http://www.ehow.com/video_4908344_early-signs-canine-pregnancy.html
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