Cepheus at 10 months

Finally after months of waiting, Cepheus milk tooth finally came out at ten months.. we were so worried before that he would not have any tooth any sooner.. but then they came out.. it is good that Cepheus appetite does not seem to be affected by his toothing but as usual he doesnt take in any milk and even more so now when he is toothing.  We have to feed him his milk via other means, ie, include it into his cereal as his breakfast as well as only when he is sleeping.. his milk intake have fallen drastically from 500ml day day to around 300ml.. i am so worried that he have not enough intake of calcium as he is a very picky eater, he only eats kraft cheese (not so strong taste) but not in large amount, also he dislikes any fruits, even his favourite apple puree (which he used to like very much when we first introduce semi solids) now... i think by the age of one, he may just stop taking in any form of milk and we have to find alternatives for his calcium and minerals.  however, my friend recommend that i let him take full creme milk (those that we adults took) instead of not taking in any at all.  I may just try.. not letting up any chance of him not taking in enough milk at such young age.  Any other suggestions?