As much as they are able to eat. At 4 to 6 weeks old, kittens are generally still suckling from their mother, or, if their mother isn't around, being fed from a bottle. Young kittens are usually fed every couple of hours.
It is not unknown for such young kittens to start to take an interest in their mother's food, although 6 to 8 weeks is the more usual time for weaning. Have a shallow dish of water out, and offer small portions of mashed-up wet cat food as frequently as you are able. It is best to put down food for them (on a plate, not in a bowl is a plate is easier to eat out of) at least six times a day.
At such a tiny age - as much as they like. Kittens need small but frequent meals. Kittens at 5-6 weeks are probably just starting to eat solid food, so it is unlikely they will overeat. Put some soft cat food down 5-6 times a day so they can have a nibble - they will tell you if they are still hungry.
It depends on their health. If they're malnourished, you should give them milk in a bottle more often than healthier kittens. You should see a veterinarian about what kind of milk to give. If the kittens are healthy and right on track, try giving them a small amount of soft cat food along with the milk.
it take a week
6 week old kittens should still be with their mother, if they do not have a mother then you should mix a tiny bit of soft kitten food with kitten milk (never use cow's milk) and slowly decrease the amounts of milk as he gets older. Make sure they get enough food by feeling their tummy-if it is hard, they have had enough, if it is soft, then they need some more. Don't feed them too much at once or it will make them sick. You should feed them about five or six times a day or whenever they are hungry. :)
The mother cat gives birth to the kittens.
milk
Yes, if mama cat is comfortable witgh you, there shouldn't be a problem touching the kittens. But don't forget, 1 week old kitten haven't opened their eyes yet so they need their mother very much, so try to handle them too much.
not very long you should get some baby milk and little bottle and feed it warm milk.Just feed them so you don't have to answer this question the hard way!
She felt that her kittens would be safer there.
Three times a day
No, I do not think it is safe for you to take them on a holiday because the kittens are only a week old, and they aren't old enough to do hardly anything, much less take a trip/holiday very well. Since it isn't safe, you should probably find someone to feed your mother cat, and check on them every so often to make sure they're okay, but you definitely shouldn't take them on a holiday/trip.
300-400grams of complete a day.
Its mothers milk should suffice.
When a mother cat feeds it's kittens, the process is called, "nursing". A mother will nurse her kittens until they have the proper nourishment and are old enough to feed themselves.