Hi Jenny
As your question is about the bottle-feeding aspect rather than the breastfeeding aspect I've moved it to this board - hope that makes sense.
There are stickies on both our boards about encouraging babies to take a bottle. Have you checked those out?
Does he take a bottle with ebm in it? If so, you could mix it with the formula and then gradually increase quantities of the formula.
I'm sure the ladies on this board will have experience to share.
x