It's coming back again!

Daniel's sickness is coming back again. Wtf!
What sickness? He doesn't want to drink milk.
Same problem happen when he was 3 months old.
He had to be forced to drink his milk until 6 months plus.
So I decided to change his formula, then he can drink without forcing!
And now I have to force him again! Does this mean he doesn't like the formula again?
Should I change his formula to other brand?
Forcing him to drink and see him crying is a very tiring and stressful job! OH GOD!
I need a SOLUTION! OHHHHHHHH!