My lo is 7months. And she only prefer soild food to milk. Should i change the formula milk? Cuz she keep rejecting ever since i change to Stage 2 enfamil.

Have you tried other brands? I think you can consider other formula. At seven months old, she may not be getting enough nutrients from solids. However, if she is feeding well and getting a balance of nutrition from solids, you can consider switching her to having more regular meals.