So my baby is 7 months old and he’s 75% breastmilk fed and 25 percent formula fed. I’m thinking on switching to only formula. He’s currently drinking enfamil gentleease but wanted to switch to kendamil organic. Can I switch the formula cold turkey or do I slowly transition it? Is it harmful to switch brands suddenly. ( im still planning on giving him breast milk until I wean him off) but for now I want to do 50 breastmilk 50 kendamil