I have used this vaccination clinic before in another state and in NW Houston on Hwy 6 and had no problems. I went to the Petco in Rosenberg, TX on 12/27/2014 from 4-5pm for the vaccination clinic. The assistants were very nice. The vet on the other hand was 15 minutes late, strolls in talking on the phone and proceeded to talk on the phone while carelessly administering the vaccinations. He did not introduce himself or ask any questions about my dogs. In past clinics, I had a good professional experience. I should of left when I had the chance. Two of my dogs ended up with a massive swelling on their neck the size of a tennis ball. I had a vet appointment on the following Monday and she informed me that the location site of the vaccination was incorrect, can possibly cause problems and is a reason for concern. It's been a week and one of the two dogs have improved but the second dog is still a concern. If there is no improvement, then another trip to the vet. I have to say that I will not be going to these clinics to save a few bucks because in the end its costing me more due to the veterinarian's carelessness. Due to my experience, I question the credibility of this vet.