DS just turned 2 a few weeks ago. At 12 months I tried weaning him to cows milk with no luck. He refused it and so I continued to give him toddler formula until I successfully weaned him to milk shortly before his 2nd birthday. That only lasted a couple of weeks and is now refusing milk all together. I was hoping it was just a phase and continued to offer milk again every few days. Several weeks later and he's still refusing. Is it ok that my DS doesn't want milk now or do I need to go back to buying formula?