Can you switch formula brands? My friends tell me I shouldn't.

Personally I fee if your child isn't having any troubles feeding, doesn't have any sort of allergic reaction and is feeding well, I too do not agree about switching brands, especially if it's just to save a little cost.

We tried karihome goats milk for newborn but baby rejected it. So we stuck to Bellamy

Why do you want to switch brands? if LO is doing well, I don't think you should.