Back from the vet. You are right, rabbits can vomit, but it is really rare. Orion has lost weight (he normally weighs 3.2 - 3.5 and weighed 2.4 tonight). He was lethargic, had what looked like brown pus (it really looked like chewed up pellets) coming from both his nostrils, and was really hunched over. The noise he was making sounded like he was either trying to vomit (very violently mind you) or he was choking. He stopped on the way to the vet, but sneezed a few times. Vet said his lungs were clear, heart sounded good, color was a little off, and his mouth was dry. He is a little dehydrated. Has a bit of a head tilt, and the ear on the side he's tilting had what looked like a pus plug in it, so he has a bit of an ear infection. Belly wasn't hard, kidneys felt a little small. We gave him fortified fluids SQ, an injection of reglan, an injection of baytril, and an injection of flo, and I have an injection of baytril to give him tomorrow night. The vet told me to keep him away from the other rabbits for a couple days, and keep an eye on the other rabbits. And hay and water only for the next 24 hours. He is staying the night in my bedroom on a heating pad set to low (with area to get away from it if he gets too warm), a litter box to get a fecal sample, hay and water. If he is still acting off, I will take him to work with me so he can get more fluids if needed and stay in the exotic ICU. Please keep him in your thoughts.