Do i need to add supplements (like DHa drops) to my toddler's diet once she transitions from formula to fresh milk?

I do occasionally give supplements to my kids. Maybe twice a week just to boost their immune/vitamins/dha because some days they may not eat as well. When they are sick I also up their supplements to speed up their recovery.

Not necessary. If your child has a healthy and balanced diet that would suffice. Anything more is not compulsory. You can do with or without it.

thanks