High quality food is easily digestible and, therefore, you use less. It also helps to decrease the amount of times your kitten goes to the bathroom. Kittens should be feed a growth formula until they are at least a year old. Growth formulas have more protein than the maintenance formulas, essential for growing kittens. This helps distribute the oils in your kitten's skin making his coat shiny and healthy.
Cats are notorious for hairballs which can be less frequent if brushed regularly.
Kittens do not need to be bathed. Most cats are meticulous groomers. However, if you feel the need, a mild baby shampoo works great. Your kitten's nails should be trimmed monthly, taking just the sharp tips off. Be careful not to trim to short or bleeding will occur.