A couple of kitten questions?

You could always try mixing in a bit of formula with some dry kitten food to get him to eat dry food . We had a kitten last year ( 1 year old now) Who was about that age when we found him and we mixed in some powdered formula which you mix with just water and added some dry kitten food. The runt may have had a harder time getting food from the mother at birth or something so he may have weaned himself earlier just because there was no competition for food that way. If the bigger kitten is just lapping up the formula every time you check his/ her bowl after eating you could try to reduce the amount of formula you give it or just lightly coat the food with it. If dry food doesnt work try just wet food. Thats all i can say