T.K.
My first son went on bottle strike around 3 months (he's now 23 mo.). I had just gone back to work and he decided that he didn't want the bottle any more. When I did get him to take the bottle he would only take it if it was breast milk and wouldn't take formula bottles. I called my doctor and she told me to try feeding him with a spoon which I found to be ridiculous. So I waited it out, I would pump instead of nurse since he had to have bottles. I tried giving him a bottle often and he eventually took it. If you stick with it, he will realize that he has to take the bottle. Also, I did try changing bottles since in his first month he took the advent bottle and then wouldn't I ended up using playtex. Hope this helps.