Quoting Colt's mommy:" You should preferably wait till 12 months, formula or breast milk is better till then. And, we get our ... [snip!] ... whole milk and I buy skim milk for myself. My LO is a little guy so I prefer to give him the extra calories in the whole milk."
thats what we do.. but a few times i have cut his formula with whole milk just to see, and he is tolerating it, my last daughter was fully swtiched AT 1 year, so i plan on doing the same with this little guy. but he doesnt eat a TON of solids like my daughter was so i will deff keep him on formula for the nutrients.