do female animals have periods?

Question: do female animals have periods?
- Keywords:
  animal,
  female,
  menstruate,
  period
Asked by tamanna26 to Sheila on 20 Mar 2011 in Categories: General.
- Sheila Kanani answered on 20 Mar 2011:
  
  Some female animals have periods, like dogs. But some dont, like cats.
  
  This is because dogs ovulate once every six to eight months but cats only ovulate when they have sex.

Question: do female animals have periods?