Hiya
Whiskas is one of the worst cat foods you can get.
Red Flag Ingredients
By-Products. This can be Chicken by-products, Beef by-products, Meat by-products, Chicken by-product meal, and so on. Any variation of by-product is a red flag ingredient. By-products are the left-over and/or rejected animal tissues from the human food industry. By-products have little to no actual meat and often times contain diseased tissue.
Meat And Bone Meal. This is that terrible category that can contain euthanized animals including dogs and cats. As if that’s not bad enough, the ingredient also contains the drug used to euthanize the animal (pentobarbital).
Meat Meal. Same as above.
Animal Digest. Same as above
BHA/BHT. These are chemical preservatives – extremely controversial – that have links to tumors and cancer.
Ethoxyquin. Again a controversial chemical preservative linked to cancer and tumors
My cat was on Felix when i got her (only 4% meat!!!) she is now on Natures Menu (70% meat), they do kitten food. Another good brand is Tesco's finest.
Id get the kitten wormed and if you are going to change the food do it very gradually over several weeks.
A very interesting read
Cat Food Uncovered