mum's kidney test results doesn't look good

My mum went to SGH today with my dad to collect the kidney test result and were disappointed that the treatment for her kidney condition did not improve. Her kidney have shrunk to a size of 7 and the doctor had advised her to seek treatment for it. Her diet would be restricted to low-potassium&sodium and low protein food. She was also not allowed to drink that much water anymore which makes her very miserable.
Actually tomorrow me and my family were going to celebrate father's day together and eat something special but it looks like we should do so as my mum wont be able to consume most of the foods shown in the menu... (*pray that my mum will be well)
I have done some research on her condition and i would help to take care of her health :)