Andi,
Our dog had kidney failure at the end of her life and this sounds familiar. We were told that high protein (like meat) was not something that could be tolerated and would accelerate the kidney failure. We kept her alive on rice and green vegetables boiled in chicken broth for another year. Towards the end we did have to do with tiny bits sucked off our fingers and hope that she would not vomit it. She too in the last few days of her life would ONLY eat beef and then vomit it, but she would not eat any thing other than beef those last few days. I figured if that was what she wanted for her last meal I would not deprive her and gave her steak. You might try rice and vegetables in broth and see if she will eat it or keep it down. You have my best wishes and sympathy. I do know what you are going through and it is awful. Good luck, Debbie