When is it safe to start food?

Karter

My mother and father in law are always trying to put food and drink (such as jelly and tea) on my 2 month olds paci. It drives me crazy because she is so young but my husband tells me they have done it to all the grand kids. She has already tried four formulas and finally she’s on a hypoallergenic formula so she’s already been having belly issues. This is my first child so am I just being paranoid or should I really put my foot down more?