How Much Should A 3 Week Old Kitten Eat?

I have a kitten that I just got today. He is 8 weeks old and weighs 4 lbs. Is it okay to start feeding him on his own? Should i give him some warm water with tuna in it, or should i watch how much he eats for now?

How often do you feed your cat cats care at the vets they always ask how much food does my cat eat daily? How often do you feed your cat cats care at the vets they always ask how much food does my cat eat daily , when would be an appropriate time to take her in for another check up if she seems healthy but is getting very thin ? I am not sure what else to say about weight loss in cats other than make sure there are no health problems like cancer etc .