My little girl is the same age and was doing the same so I got some from boots and add 0.5ml to her juice in the morning and she seems to drink it all xx
I use wellbaby liquid from boots, mix it in water or milk
A little spray in the mouth that tastes nice. Read the reviews https://amzn.eu/d/80hQChb
Wellbaby multivitamins, our dietician recommended us
We use the abidec multivitamin in raspberry flavour as all the others we tried tasted and smelt like cod liver oil and were difficult to get down him.xx