Stop nursing

So my little man is almost 10 months and he finally got two bottom teeth so I decided to just pump him bottles from here on out. I was curious of everyone's experience with this? Since I work 3 days a week he is used to having the bottle so he seems to be transitioning fine. I am worried about my supply though. Also how many bottles I should be giving him a day? He eats 3 meals a day plus some snacks and he eats a lot! Any tips would be great thank you!