We use wellbaby drops. It comes with a syringe and it’s only 1ml which is such a little. I just squirt it in his mouth and he swallows it no problem
We use Wellbaby liquid
@Charlotte we use these too
Same one as @Charlotte
Wellbaby drops in milk x
Well baby multivitamin
https://amzn.eu/d/8BroTxj
Well baby I think it's called I just add a teaspoon into evening milk