Halaal Food & Drinks

Eating halaal and wholesome food

Q: I try to feed my family healthy with treats occasionally, but I have to force them to eat their veggies etc. My son sneaks to make savories or sweets/crisps or he will just not eat at all. He told me that I must remember sickness comes from ALLAH even if he eats these things.

Is this acceptable that I'm doing this or should I be more lax in this regard as long as they are eating halaal? He is 11 years old doing hifz.