Not eating at daycare...

Okay mamas... hopefully someone can make me feel better. My son goes to daycare M-F from 8-4:30. He eats around 6:30 in the morning and again as soon as we get home. The whole time at daycare he is only taking two 3oz bottles. He usually fights the bottle and only takes 2oz and then finishes 30-1 he. later. 6 oz cannot be enough for him.

He is a really happy baby. It’s been like this since he started.

How concerned should I be?

Edit to add, he is breastfed. He just pushes the bottle out with his tongue and won’t take it.