Thank you both for your kind interest in my trouble: i really appreciate that. Coming to your questions and ideas, i can tell u that:
1) No, he usually doesn't have other kids eating around him because he's our first born son and as we live in a town far away from our families, he doesn't have cousins growing up with him. (Anyway i'm waiting for the second one who will born at the end of april: hope she's a girl !). Sometimes, during vacation, he happened to sit at the table with some other kids who ate almost everything, but it made no difference for him...
2) We exposed our problem to the doctor: she gave us no new advice. Everything she told us to do, we already did with no solution. We didn't actually contact a nutrition expert because anyhow, according to the doctor, the child is growing perfectly: we would have done it if he didn't, of course. But maybe it's time to reconsider this option.
3) He doesn't take only the bottle. He actually use a normal cup to drink, if we ask him to. The problem is that he only drink if there's milk with his cookies melt in it: if we just change the cookies he notice it and doesn't drink. Anyway, once in a week i put an egg yolk in his milk-bottle and he drinks it up normally: it's not much, i know, but it's something...
4) He drinks water (in a normal glass) and sometimes, but rarely, a little bit of fruit juices: no more than 50 ml per time.
5) About the desserts, he likes everything that is sweet. He likes custard, ice-cream, milk-chocolate and goes really mad about mascarpone and ricotta (i don't know how you call them in english !) which are two kind of smooth cheese used especially to make desserts. But we don't want him to become a sugar-addict !
These are the answers to your questions. We think that the real problem is his character: he's really stubborn ! He has his strict habits and doesn't want to change them. Not-eating is just one of these because we are sure that he would like any kind of food if he only tried it. I mean: he once ate chinese spicy food, fish, minestrone without we even asked him to taste it !! We believe that he doesn't eat just because he knows that we want him to. Maybe he'll eat when he'll be old enough to face a discussion with us and to understand that WE don't need him to eat: HE needs it.
Anyway, i really thank you for your help and attention: if there'll be news, i'll post them. Thank you again. Bye
Silvia