Hi there...
I know Your DS is on 3 bottles but this is how my day went on 4 bottles (then ill give you the new routine)

Chelsea is on a 4 hour routine as well. Prior to monday this was her routine:

8am-bottle
930am-toast
10am-bed
12pm-bottle
2pm- sandwich, fruit or yoghurt
4pm-bottle
430pm-bed
6pm-dinner (what ever we were having)
7pm-shower
8pm-bed

Now Chelsea is on 2 bottles a day:

8am-gets up and plays
830am-bottle
10am-fruit
1030am-bed
12/1pm-sandwich, fruit, yoghurt/gel/custard
230-biscuit,fruit
4pm-bed
6pm-dinner what ever we are having
7pm-shower
8pm-bed

And i offer water all day long and other snacks as she wants them.