please just be careful with feeding only whiskars food, we did that with my older kitten (who is about 14 years of age) and sadly there is something in it which has been found to cause urinary tract infections in cats, he was in the vets for a few weeks and then had a relapse of it again (the treatment cost us thousands of dollars and now he has a very sensitive stomach, can only eat certain brands of food, and is generally not as healthy as he could have been if we fed him better food, im not sure what does it, but every vet as i seen and spoken to all say that whiskars is not healthy for cats in the long run as it can cause to many problems within their tract system