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== Bitch ==
 
== Bitch ==
   −
* Long period of '''proestrus''' where the bitch is attractive, but will not allow mating.
+
* Long period of '''proestrus''' where the bitch is [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology|attractive]], but will not allow mating.
 
** Characterized by:
 
** Characterized by:
 
*** Vulval swelling
 
*** Vulval swelling
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