<human>: My dog used to itch her skin off... For years. Got to the point she'd see the vet just for this several times a year. After some research (vets, like big Pharma want to treat not cure) I went grain free with her and literally overnight she was a million times better; skin, coat, stool, gas, and itching.
Fast forward a few years and now she has kidney issues. Again a sucker to the vet he puts her on science diet k/d. This helped with her excessive drinking and peeing but due to grains she now is trying to scratch her skin off again.

Low phosphorus is recommended for kidney issues mostly.

We now have to options...

1) keep her on k/d and let her kidneys survive while she is so itchy in her own skin she is miserable, 

Or

2) Go back grain free and let her enjoy life which will end prematurely within a year due to kidney failure.

If it was me I'd rather be comfortable and happy for the shorter time. She's ten so has only got a few more healthy years anyway.

I am too busy to go raw or fresh cooked every night so I am looking for something extremely low in phosphorus) (less than point 5% like the k/d) and still be grain free.  Wet is preferred as it helps with water intake, but I'll try anything at this point. I am currently awaiting return emails from Blue Buffalo Wilderness which was recommended. Problem is all dog foods don't have phosphorus amounts labeled.

Can you condense the text into a few key points?
<bot>: looking for an ultra low phosphorus grain free dog food so I can deal with both of my dog's issues of grain allergy and kidney issues.