We had our 7 month old boxer, Sophie, to the vet earlier this evening. She was there as a follow up because she had crystals in her urine and had been on prescribed dog food. The vet gave her a clean bill of health and cut her toenails. On the way home, she started to vomit. As soon as we got home, she vomited with some blood in the vomit. She became very lethargic, her breathing was rapid and she seemed cold. Since then, she has coughed up blood and vomited more food with some blood in it. Her breathing is still rapid and she is very lethargic. She seemed fine one minute and very seriously ill the next. My wife called the vet's office right away and they did not seem overly concerned. When she later coughed up blood, my wife tried calling the emergency on call number for our vet. This person also did not get overly concerned and said that he would see Sophie tomorrow if nothing has changed. We are very concerned about her. Any thoughts of what may be wrong with her? Thanks