Tom hated dragging Ziggy to the vet, because even if he was excited at first, he quickly got nervous, once he realised what was going on.

But he had to take him, whether Ziggy like it or not, because vaccination was important, and since he wasn't really sure which vet go to (because the last appointment ended up by Ziggy escaping from the veterinary centre, since he clearly didn't trust the last veterinarian - Tom was too embarrassed to go back there again), he asked his friend, and eventually he got an appointment at the clinic where you worked.

You got out of your office, calling for "Tom and Ziggy", and when the dog heard his name, he tried to escape (again), and Tom eventually had to take the big golden retriever into his arms, since there was no other way with the dog.