K.K.
Hi J.,
Well, the recommendation used to be at least one year old and over 20 lbs. I have read many other things stating to keep them rearfacing til age 3, but it looks weird to have a child folding his legs due to being too tall. I would not rush it though. I kept my oldest rear facing til 18 months--she was about 22 lbs by then. My 14 month old is still rear facing weighing 19 1/2 lbs. The local fire department will know.
As for milk, whole milk is recommended at 12 months...
K.