Here's why:
* Identifying the Bug: It's impossible to diagnose the problem based on a description. While it sounds like a tick, there are other possibilities.
* Potential Health Risks: Ticks can carry diseases harmful to dogs. Vomiting can also be a symptom of various other illnesses, some serious.
* Veterinarian's Expertise: A veterinarian can properly identify the bug, assess your dog's condition, and recommend the right treatment.
Please don't delay. Contact your veterinarian or an emergency animal clinic right away. They can help determine what's wrong and give your dog the best possible care.