aw bless, its a long hard road it really is, i take it with a diagnosis being made and a speech therapist involved that there is a consultant involved with the little one still?
if so your sister needs to be expressing her concerns with the consultant and they are her best port of call and do move quickly with such matters. ENt depts, opthalmic deps, childrens mental health etc
does the little one have choking episodes whilst drinking fluids? it maybe that a videoflouroscopy needs to be performed, how is his behaviour in general? attention/sleep etc
did the baby become distressed whilst being born or was there an event that couldve been prevented?
if their is a diagnosis of brain damage the consultant shouldve submitted the DLA forms for your sister
hang in there she really will get the help she needs

although it does seem like an uphill battle at times
honey x