At 10 months we went to 2 bottles HOWEVER calum is on 3 meals per day with snacks, his meal consist of meat, veg, fish, pasta, rice, etc..... and I offer custard, yogurt and fruit - so he gets a balanced diet.
to tweak your routine move the 4pm bottle to before his afternon nap(but don't feed to sleep) then offer solids at 4 or 4.30pm