Wiskers is not a good brand of food, It very grainy and has alot of meat by products and paservitives. Try searching for good brands of food here. www.Naturapet.com.
Names of the brands you want to stay away from. 9-lives, Meow Mix, Fancy feast, Speical Kitty, Science Diet, Iams, Whiska's, purenia.
Your vets trying to push products on you to make some money, sorry but thats the way it is sometimes.
i doubt the vets would push whiskers on her just for the money it is a very cheep brand of cat food. but the others i agree with. my vets have never recomended whiskers , they have always told me to stay clear of it.
I believe the member is in South Africa ... and it may be that there isn't a lot to choose from like there is in the US. The best advice is that we all should feed our cats the highest quality food we can afford to buy.