Which milk for toddler

I follow a Paleo diet and don't know what type of milk (if any) I should transition my 14 month old onto. I breastfed for his first year then supplemented with an organic formula. He's still on baby food (puréed) and slowly trying table food, but is also on the formula. I'm not comfortable with weaning him from the formula to regular milk so I really need some advice on if I should try him on an organic cow's milk or a different type.
I know this is off-topic for this forum, but I've followed your advice for years and you're pretty much the only authority I trust. :)
Thank you in advance! Tweet