I'm definitely veggie-free for a couple weeks now, don't even use botanicals for seasoning, just have to quit the coffee and the sugar-free root beer (I think the root beer is behind me already, but it still beckons me in the the grocery store), and I'll be altogether botanical-free.
As for digestion, it works great, but you have to stay away from dairy products also (maybe it's just me). I think butter is okay, but anything else cause terrible constipation without fiber. It's hard to tell because I'm not pooping much anymore. You'll be shocked at how much coal you can shovel in with so few cinders coming out. I guess meat is overwhelmingly made up of solubles.
Eat lots of fat. Eat nose to tail, as much as possible. Eat eggs. Get a slow cooker and do pork hocks and soup bones and all those wonderful gristly things you can find, and eat everything but the bones. But suck the marrow out before you throw the bones away. Eat tripe and cheek meat and everything unusual that shows up at the meat counter. Your taste buds will change and it'll all be wonderful.
It's been about a month now, I've been total carnivore. I misspoke when I said a couple weeks. I'm still troubleshooting problems like electrolyte imbalances, but flying blind with no blood work, and yet I think I'm making progress.