You do not want or need low protein. It is the quality of the protein that is important. You need to get a copy of the blood work from your vet so we can see the normal range from the lab they use for testing, in order to see how off your dog's levels are.
Here is more info on what I did for my KF girl. Don't hesitate to PM or call me for more help if you want to.
Unfortunately the blog site I use is not working right now (they are working on it). But if you call me I will pull my girls file and go over it all with you on the phone. You need to do this by Thur night because I am away on weekends (Fri till Mon night) and do not have my dog files with me.
Here is the blog anyway. Keep checking as it may be back up in a few days (I hope)
https://www.heartypet.com/blog/?p=86
From memory, CoQ10, EPA/DHA fish oil to bowel tolerance (meaning more than one a day but increase gradually), Vit. E, and added quality protein to the kibble are all helpful for KF. You also need a phosphorous binder for the added protein (I used crushed egg shells). And the kibble you choose should be 1% or lower in phosphorous. I used Royal Canine Max Mature 26 (phos. at .6) back in 2003 but there may be others on the market now with low phos.
You can also go to
www.dogaware.com in the mean time. Lots of good info on KF there.
Edited: his numbers may not be alarming but won't know till I see the normal range from the lab. Catch it now and you may be able to reverse it all or at least keep it in check.