at 3 - 4 months you should think about reducing them to 3 meals a day, my springer lad is 5 1/2 months and we're feeding him just over 200g a day soon to get reduced to 2 meals.
It really does depend on the food though but somewhere around the 200 mark is probably just right

I cant rmeber how much Fin weighed at 3 months they seem to put it on so quickly.... he may be a litle light but so long as you see stepped increases when you weigh him hes doing fine. my finn went up around 1.2kg stages every 2 weeks around that age and has now slowed to around 6-800g every two weeks


Just to say.... have a look around for some better quality food for him. have a look at the price your paying per week and see if you cant buy larger amounts that will last longer of a better quality food cheaper. There are lots on line - supermarket foods are really honestly just cr*p