Mine get the runs from dry food, do your cat a favour and stop feeding dry! Try some actual cat food instead of cereals better suited to humans (which Whiskas is, unfortunately).
Note that "kitten food" as such is a scam as well, wild animals do not get any different food in the wild than their parents.
Cats aren't meant to eat human produced dry food, which is even more full of rubbish than most wet foods.
Note that all dry foods are full of fillers, such as grains and rice, and that cats can not digest plant foods. They are obligate carnivores, and get most of their water intake from their food, hence a cat on dry food will be in a constant state of dehydration with urinary tract and kidney problems int the future.
To fix his bowels up a bit, try some raw meat, i.e. minced cow.
I found Animonda Carny (available at zoo plus) working quite well or MAC's (thehappykittycompany.co.uk) or if you have some money to spend, Omnomnom.
Have a look at the nutrition information:
- Whiskas
Meat and Animal Derivatives,Fish and Fish Derivatives (including 4% Salmon) ,Minerals ,Vegetable Protein Extracts
So, we have some offal to make it smell nice to the cat and a whole 4% of meat. And a lot of filler.
Alternative suggestions:
Animonda Carny complete food
Meat Saucer:
Beef (34%, lung, meat, kidney, heart, udder), broth (31%), chicken (27%, liver, stomach, neck, meat), wild game (7%).
Beef & Chicken:
Beef (38%, meat, lung, heart, kidney, udder), broth (31%), chicken (30%, liver, meat, stomach, neck), calcium carbonate.
Beef & Heart:
Beef (53%, meat, lung, liver, kidney, udder), broth (31%), heart (15%), calcium carbonate.
No fillers, though the meat is of mixed quality, but its a very good basic food.
Lets have a look at some of the premium stuff:
MAC's Duck, Rabbit & Beef complete food
Ingredients: Meat (min. 45% game, min 15% duck, min. 15% rabbit, min. 15% beef) and animal derivatives (liver, lung), broth, minerals, taurine.
Om Nom Nom Chicken and Veal complete food Unfortunately very expensive as its an import, but when you open the can you can actually recognise whats in it.
70% Meat and Organs as follows:
20.0% Veal meat and hearts
15% Chicken hearts, whole
15% Chicken necks
15% Chicken meat and stomach
5% Liver
26 % Chicken broth
3 % Carrots
1 % Minerals & Vitamins
Note that you're much better off feeding your cat smaller portions of nutritious food than lots of rubbish.
Animonda is quite economical and can be found at zooplus.co.uk