The Hill's R/D wet food is, I think, 15% protein.
Her chicken wing is 17%, but the nature's menu nuggets are 14% (for the meat ones - I suspect there are some varieties with lower protein content than the one in our freezer currently, and we'll change to those once we've finished this bag) and 9% for the veg ones (she gets 3 of each, as she's prone to being tubby so we bulk out her food with the veggie ones!). She normally gets a chicken wing in the morning and the nuggets in the afternoon.
We have been feeding heart a couple of times a week, which is much higher in protein, so we will reduce this and possibly give her tripe instead (13% protein I think) saving heart for a very rare treat (and gently cooking it which, apparently, reduces the protein levels...)
If, when I see the results, there's just a slight rise in BUN and no increase in creatinine (sp?) then we might allow a very slightly higher protein meal every now and again, but I'd rather err on the side of caution (while not abandoning the raw diet as she's done brilliantly on it).
Likewise we are not stopping her bedtime biscuit (25% protein) as this is the only thing that stopped her being sick overnight - and she needs a good quality biscuit as cheaper ones caused her to dig holes in her skin. But other treats through the day will be replaced with fresh pepper or carrot, or dehydrated sweet potato etc.
I obviously very much respect the vetinary opinion that we need to reduce protein (though, of course, the other suggestion is limit sodium which is very low already in a raw food diet, so that's got to be good), but know our vets don't know too much about the raw feeding and always like to do my own research. In doing that, I will read vetinary articles suggesting prescription diet is the only way to go alongside raw feeding articles suggesting that whole prey model is the only good way to feed and there's no need to reduce protein in kidney issues, and I will try and find the middle ground that reduces the strain on her kidneys while keeping the benefits of her raw food.
(We are constantly being told how good her teeth are, for example!)
I had noticed she was drinking a lot more, so that does fit with her kidney's causing some problems - though she's not really urinating any more at the minute... so hopefully we're fairly early on in any problems.
Though if anyone can work out a way to tell her she shouldn't sneak through the baby gate on the stairs when the children are going through it to raid the cat's food, I'd be very grateful!!!!