Starting formula

Kandy

Hi all, just a bit of background. My baby girl was born in February and I breast fed her for the first 2.5 months. I introduced the bottle with pumped milk and she decided that she no longer liked the boob so I plan on pumping up until the 6 month mark and then switching to formula.

Do you have a recommendation on the type of formula I should use? Can I switch cold turkey or does it have to be a gradual change? Thank you in advance for your help!