How much sugar is in this yogurt? Plain yogurt is fine in high quantities, but sugar rich yogurt is not much better than ice cream. If itsit's sugar rich, he shouldn’t eat much of it at all, end of story.
If it is plain non sugary yogurt though, the thing to guard against is him eating only yogurt. I will offer the following guidelines:
- Limit yogurt to two meals/snacks a day
- When offering yogurt, mix something else like fruit or chicken with it. You can use his affinity for yogurt to introduce other foods
- If he refuses to eat other foods or cries for yogurt, might be time to take a 2-3 day break.