At 12 months Connor was on the three bottles of EBM a day at 18 months he still has two and sometimes the third one after his afternoon nap. What you can do is replace a bottle or two with another calcium/source. For example one slice of cheese is equivalent to 1x250ml bottle of milk, or a small tub of yoghurt is the same. He probably doesn't need all that much fluid as milk now if his solids are well established, just make sure to offer lots of water so the fluid levels are maintained....hope that makes sense!