ToniaKristin,
We have 2 daughters both with ssw cah. They do like to drink milk but we also supplement their calcium by giving them 2 tums with calcium per day. This also helps with their cranky bellies. There are also lots of different calcium supplements that come in chocolate or strawberry creme flavor and are pretty good. I would ask your endo how much he would like to see supplemented. Your son may not like milk, but what about chocolate. :) Sounds like a win win!
Good Luck and blessings,
Tonia