I used to have children arriving at 7am but they are gone. Loved them, but so glad I now start work at 8am! So yes, I started serving breakfast at daycare. Now my meals are at these times:
Breakfast 8:30am
Lunch: 11:30am
Snack: 3pm
It seems to me if you are feeding a snack at 10 and lunch an hour and a half later the children would not be hungry. I serve a giant lunch with all the food groups because my little ones are really hungry, then 2-3 items for breakfast and for afternoon snack.