Feeding a Puppy Dry Food?

How much should a Chihuahua/Pug mix puppy eat per day? My Chug, as they're called, is 6 weeks old (too young, but things happen) and I'm worried about her overeating, as Pugs tend to do. On January 15th, she was 5 weeks 4 days old and weighed 1 pound 4.2 ounces. Today, January 19th, she weighs 1 pound 9.6 ounces and her belly looks a bit fat to me.

Currently, I give her as much dry puppy food (soaked in water) as she'll eat 4 times in a 24-hour period. But 5.4 ounces seems like a lot of weight gain in four days. I've never had a puppy this young before. Any advice or tips on what to do?

By Grumblesnort