So my 10 month old doesnt drink regular formula,he drinks Soy formula. when its time to take him off…

So my 10 month old doesnt drink regular formula,he drinks Soy formula. when its time to take him off of formula,should i keep him on soy or switch him to dairy milk?

The lady at WIC said i could either come back early September to get more vouchers for milk or i could wait until his birthday to get the wic changed to whole milk.

Idk what to do because we dont drink whole milk,too fatty and greasy.