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"The clinical signs of pseudopregnancy range from subtle to extreme. In some cases, they are so convincing that even experienced breeders are confident that a litter is coming.  Signs include behavioral changes (anorexia or appetite fluxuations, excessive vocalization, whining, restlessness, signs of aggression, depression, or anxiety), maternal behaviors (nesting, digging, mothering or \u201Cadopting\u201D of toys, stuffed animals or other inanimate objects), mammary problems (engorgement, lactation, licking of the mammary glands/self-nursing), vomiting and abdominal distention."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.petwave.com/Dogs/Health/False-Pregnancy/Symptoms.aspx>