Question on Pup's diet, water and excerise

I got a 36 day old male lab 10 days. He was on Royal Canine Starters & I've kept him on the same food. I give him 4 meals- 20 gms each, every 4 hrs starting 8:30 am. I started adding around 5 gms of half cooked tiny carrot pieces & peas. Instead of adding water to the meal I now use yoghurt with lukewarm water.Do you think I am feeding him right? The breeder also told me not to give him water until he is 4 months old. Was the breeder correct? Also, he runs and jumps too much. Should he exercise that lot? I read that they should not. What do u suggest?

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