...poop?

I'm after a little bit of help in regards to my 2 eight week old kittens...

I'm slightly concerned at how much they are pooping. I'm talking 3-4 times A DAY EACH. They don't seem to be in any pain at all and are very happy running around, playing and tormenting each other right up until nature calls.

I am feeding them only dry food at the moment, just mixed with a little bit of warm water. I feed them an egg cup full of dry food each 3 times a day (about 6.30am, 12.30ish and 5.30pm) and normally one egg cup full between them before I leave for work and maybe another one before I go to bed if they are hanging around the kitchen meowing.

I am worried that I am over feeding them but everything I have read says that kittens only eat when they're hungry... they don't always clean the bowls, but I don't throw too much away either.

They have little round bellies, but I can pat their tummies and there doesn't seem to be any discomfort or reaction.

The consistency of their 'business' is like toothpaste... it's not runny at all so I'm assuming they are generally ok...

Is this normal for kittens? 3-4 times a day seems a little excessive, but then again they are only little and the foods gotta go somewhere...

Any comments would be greatly appreciated!