Hi, my 9 months daughter was diagnosed as hyperphe,too.We are leaving in Turkey. And our doctor’s target is to keep her level under 6 untill her 2nd birtday like any others. We are on a light diet. As she is only nine months, she can eat biscuits ( limited), vegetable soup (measured), yoghurt ( strictky measured), baby food and special formula. I couldn’t find any document about hyperphe just as like you. But our doctor is giving us hope by telling she will be only a standard vegeterian ( with no limits) which means she can eat regular bread and etc. and may be dairy products. It is very good to meet another mother with the same situation.