I don't know...this seems more than regular empty stomach throw up. I usually give my tiny Poodles and Chi mix an egg or a half an egg and/or a little yogurt or something most mornings and their regular, main meal in late afternoon/evening. One of them often throws up just a tad (all bile/water) if he doesn't have some little thing in his stomach. With this much vomiting you're seeing, I'd be concerned. If you remove the meat you think might be causing a sensitivity, and the vomiting continues, I'd get the dog to a vet. Maybe there was some parasite but I'm pretty sure that usually causes diarrhea. Or it might be something else. Is your dog feeling okay the rest of the time? Playful, energetic etc?
Anyhow, you should be able to accustom your dog to a good raw food diet in time. Just take it slowly. Have you tried some lamb? I think that's suppose to be pretty easy to digest. I look for meat in the grocery store (because I haven't found a better alternative) that is about to expire and they mark it down. Watch the dates and go there on the day that is the sell by date in the morning. Ask them if you don't see it marked down. Sometimes I even get grass fed/organic stuff. My dogs eat anything and aren't sensitive. I didn't read all the advice to go as slowly through the proteins as is recommended soon enough. I went kind of gradually but after a few meats, I just started giving them anything. Luckily they've been great most of the time. Once in a while, I make a boo boo and give too much organ or too much bone but usually, it's all good. I've fed things too before freezing by accident. Luckily nothing happened.
I've been feeding raw since mid December...about 5.5 months now. They eat beef, lamb (heavier on the red meats) pork, chicken, (chicken and duck feet also...gizzards and hearts (cheap)) duck, rabbit, goat, cornish game hens, weird stuff from Asian market like pork uterus, sardines, fish oil on the days they don't eat fish. They eat eggs, sometimes a little yogurt for a snack. (they got a frozen yogurt ice cube treat out on the lawn yesterday, as it was a pretty hot day) They eat mostly chicken bones but all kinds of meats INCLUDING raw green tripe...probably some I've forgotten to list. Raw green tripe is a super food as far as I'm concerned. You can't find it in a grocery store, only online as far as I can tell. I feed a little tripe every meal. It's amazing, well balanced, full of natural probiotics and digestive enzymes. I highly recommend that as a muscle meat. It might help your dog particularly. You've only been doing this a short time. I'd say give it some more time for adjustment. Are you feeding just liver? Be sure to go 50/50 liver and some other organ.
Note: I can't believe I'm giving advice when I'm rather a newbie myself. But here I am expounding. I've read a ton about this and that...and these folks here have really been a well of knowledge and help. If my advice is off kilter, please, you more experienced ones, correct me. lol. I hate to be presumptuous.