Did you know:

Cats are Carnivores and have an important Protein that they cannot produce them selfs so they rely on us to help them.

An Essential Amino Acid called Taurine is needed in their diet.

They can get this protein from seafood and animal meat.(A proper balanced cat food contains taurine)
If this essential amino acid is not in a cats diet a variety of serious health problems will occur.

http://www.hillspet.com/cat-care/protein-your-cats-special-needs.html