The need for protein is overrated for the HCG diet. Besides, veggies of all kinds offer plenty of it. The idea behind the meat choices is to limit dietary fat. Research is very clear on what the best diet would be, before, during, and after the HCG diet.
Just in case you are looking for a way to survive on the meat-centered HCG diet protocol without meat, here is an idea that will work perfectly: go vegan. Specifically, go vegan without grains. Here is an extreme version of how to do so at this link:
HCG Vegan Diet Protocol
Sandy and Steve make some good points, although some of their explanations sound like voodoo science. Here is what I have found in the scientific literature: A grain-free vegan diet, raw or not, will be better for fat loss and lifelong weight management regardless of whether you go through the HCG diet protocol. Any advice that you see, including that from Sandy and Steve, about cleansing and detox is without scientific merit, even though it may sound reasonable. It may even be correct. It just has no scientific merit.
The three biggest flaws of almost all diets are: 1) too much protein; 2) too many grain-based foods, 2) too much animal-based food. I guarantee that you would not even be considering the HCG diet if you reduced those flaws. This will be a subject that I dig into with more depth later.