My Chihuahua was vaccinated about the 3 weeks ago. She had a very bad allergic reaction as soon as the shots were given (vomiting, diarrhea, trouble breathing). The vet gave her a injection and sent us home. She has sick for the rest of that day and all night but seemed OK the next day. Since then she had a few times were she vomited and then a couple of days of diarrhea, but we didn't think much of it, just thought she ate something that didn't agree with her. Then 2 weeks later she started vomiting and just didn't stop. We took her to the vet, they say it's not related to the shots. They have tried a couple of different med's but nothing seems to work. She's been really sick for over a week now and she's lost soooo much weight. I still think this was caused by the vaccinations. I'm wondering if anyone else has had a reaction that lasted or caused problems weeks later?