The reasons for small golden retrievers:

1. Usually puppies have very poor adaptability to the environment. Changes in the environment or sudden stimulation will cause them to have a stress reaction, which will making them more susceptible to viruses.

2. If a dog has weak resistance and comes into contact with other dogs carrying the virus, it is likely to be infected.

3. Dogs that have not been dewormed are easily infected by parasites, causing vomiting and diarrhea, which leads to a decrease in the dog's resistance and is easily infected with parvovirus.

How to prevent parvovirus:

1. For unvaccinated dogs, you need to avoid walking outside, and then clean and disinfect the environment, especially dogs The dog's activity area, the pet owner's hands and the soles of shoes, etc.

2. Disinfect the dog regularly. Try not to bathe the dog or take the dog out to interact with other dogs before the young dog has been vaccinated. Take the dog out normally. Don't let him sniff other dogs' waste.

3. Dogs should be dewormed on time. It is recommended that external deworming be done separately from vaccination, and not at the same time.