Has anyone stopped formula cold turkey?

My lo turned one on May 4 and I'm having a hard time transitioning to whole milk. She was having 4-5 bottles per day of 6oz formula. She doesn't eat much table food...she eats like a bird even though I offer 3 meals a day and snacks. She got a late start on purees/foods as she started around 8-9 months simply because she wasn't interested. I'm trying to get her off of relying on the formula bottles but am struggling. With my first child we stopped formula cold turkey and it went fine but he was a good eater. The Dr said she wants her off formula within a month and suggested doing half milk and half formula bottles. But Dr also said that milk isn't essential as long as she eats dark leafy greens like kale spinach and broccoli... What are your success stories?