I bred rabbits for years and that is correct. You should never give rabbits meat, their digestive tract is not set up for it. If they are fed properly there should not be a protein problem. We always made sure our breeding does had plenty of alfalfa hay. That had all the protein they needed.
Ok,wasnt 100% sure, but I figured she knew what she was talking about. She breeds and shows rabbits. Mycdoe had some kits a while ago, she killed 2 and raised the other 3 perfectly fine. I didnt know she was pregnant until she started pulling fur. Heck I thought both my rabbits were does!