Gastrointestinal is an adjective meaning of or pertaining to the stomach and intestines. A tract is a collection of related anatomic structures or a series of connected body organs.
You can obtain mother's milk replacer for young kittens at many of the pet stores in the area. When the kittens are 8 weeks or older, they no longer need the milk but may enjoy it anyway. Milk that has been specially processed for cats to consume safely is available from many local groceries. Water. Keep clean, fresh water available to your kitten at all times.
Kittens, at any age, have small stomachs, so the best method of feeding is little and often, as often as four to six times a day for very young kittens. As kittens get older and bigger, they can be fed bigger portions in less frequent meals. By 6 months, a kitten can generally eat two or three times a day. How often a kitten needs to eat wholly depends on each individual. Some kittens eat more and some eat less. Generally speaking, its ideal to feed your kitten as much as it wants. Kittens need twice as much Protein as an adult cat does, so don't be surprised if you are feeding your kitten much more than you would an adult cat.