When to take bottle away?

Je

My LO is 10.5 months. He currently has 4 bottles a day. When do I completely take away the bottles away? I know I have to start cows milk when he is 12 months. He already takes water in a sippy cup. Is he having too many bottles for his age? Should I be cutting one or 2 out by now? When do you start feeding solids before the bottle?

Sincerely,

Clueless FTM.