Pedigree dog food can be given to cat?
Cats need a diet consisting of a high meat content - probably more so than dogs. Meat is mostly made out of Proteins and Fats, and cats use these as their primary energy source. Here are a few things that are present in cat food that are not in dog food:
Taurine: Cats cannot synthesize this compound (unlike dogs and most other mammals), so they must get it straight from meat. Animal tissues such as poultry and fish are natually high in taurine. Not enough taruine in the cat's diet can lead to heart problems and blindness.
Vitamin A is another component cats cannot produce. Dogs can use a compound called "beta carotene" (its what gives fruits and vegatables such as carrots the red-orange colour) and turn that into Vitamin A. Cats cannot. They need to get Vitamin A from meat.
There are also number of fatty acids cats cannot synthesize in their bodies but dogs can, so feeding a cat food specially made for them is the safest option as all the nutrients are included in the food.