dog's menstruation

[kathypie]

Why do dogs have their menstruation?

[Saspi]

why do women menstrate? its the same things as with women...the overy's are shedding their lining to prepare for the next month, or potentially a litter or puppies...

[nrmatth]

well said. i agree.

[andy hughes]

Most animals with a complex physiology have a female mentrual cycle - it is only because the dog is domesitcated that we even notice this phenomenon