Picky eater or teething

My baby has been really picky she’ll only eat a few bites and sometimes refuse to eat and I’ll have to make her something else to eat. I saw that she’s teething again (bottom teeth next to her first teeth). But this has been going on since 12/14. I took her for her 1 year check up and I informed her pediatrician that she really doesn’t eat and as a result is not at the weight she’s supposed to be at (3 lbs under her weight). I’ve tried pediasure grow and gain and I’m giving her poly vi sol droplets (I’ve even doubled the doses). Her pediatrician also advised me to lower her bottle intake and increase her solids which I have and I see no progress whatsoever. If any mommas out there know of some appetite boosting vitamins I would highly appreciate it as I have been doing my research but I’m a little skeptical because some of them are foreign. Thank you I’m advance.