My dd is almost 20 mos. old. From the time she was able to chew, she has loved to eat chalk. Even now I have to keep it away from her or she will try to eat it. Does this signify some strange deficiency in her diet? I know she is not deficient in calcium b/c she drinks TONS of raw milk.
Milk soes not contain calcium that is bioavailable...and unless she is getting a good amount of other nutrients (magnesium, potassium) she can't use it anyway. But it does sound like pica if it's a compulsion. You may want to ask a good doc or nutritionist.