"There's a quick test we can do, we can walk out to the car with the testing kit, test them in the vehicle, and take that into the clinic. We can get an answer in 10 minutes."
Keeping the dog in the car prevents the chance of contagion to any dogs waiting at the clinic.
"If an animal tests positive, we can take them into the side of the clinic, so there's no cross-contamination."
He said they are dealing with severe dehydration, so dogs are put on fluids as soon as possible.
"It's like a very nasty gastroenteritis, it can be very painful.
"Usually in 24 hours, it can turn around. In most cases, they make it through."
Mr Bruere said avoiding cross-contamination was a design aspect they considered when they built their Lincoln Rd, Masterton clinic last year.
The New Zealand Veterinary Association says all puppies from six weeks of age should be vaccinated against parvorvirius and other canine diseases.