why are cats when they are younger scared of their relflection?

Question: why are cats when they are younger scared of their relflection?
- Keywords:
  cat,
  fear,
  reflection
Asked by kgriffiths31 to Kevin on 20 Jun 2012.
- Kevin Mahon answered on 20 Jun 2012:
  
  Chacnes are they;ve never seen it before! Cats treat anything new or unknown with caution and suspicion, and that goes for reflections as well. Older cats can get used to seeing it and therefore not get scared so much.

Question: why are cats when they are younger scared of their relflection?