why Duke is going to be able to beat up his brother in a year

What Duke ate today:
1 handful blueberries
5 strawberries
1 go-gurt
4 handfuls peas
1 hot dog
1 quesadilla
2 slices of cheese
1 handful cheerios
2 bananas
1/2 a batch of Mac and Cheese
3 slices of an apple

What Will ate today:
1 go-gurt
1 quesadilla
3 slices of an apple
2 T peanut butter