I am not a great fan of kibble being the main meal but I have done as the Specialist recommended & his creatine. blood pressure & protein levels haven't changed over the past 18 months & the Specialist is really happy with him.
They can have egg white & maybe google the yoghurt that has the lowest protein content. Greek yoghurt has the highest protein. Maybe cottage cheese?
Small amounts are ok as long as it's counted in as part of the allowed 10% of protein .
They do get sick of eating the same kibble . I give a small treat & put some on the kibble to get him eating.
Apparently some human kidney patients don't feel like eating 1st thing in the morning. Chewy is a bit like this & he usually has his breakfast after 11am.
Because he's not getting much protein he also has a small bowl of renal kibble around 10pm in order to maintain his weight.
You can also get RC pouches of renal wet food from Budget.
All Natural Vet in Sydney (in Russell Lea) are very good holistic vets. I have seen Barbara Fougere over the years & have found their Chinese herbs excellent.
I know they do a Chinese herb supplement for kidney disease. They are also really good with diet advice. They do phone consults & will send the recommended herbs to you by mail.
Hope this helps.