No matter how many months old a dog is, there is a possibility of getting infected. However, after 6 months, the dog’s resistance will be stronger and the chance of infection will be smaller. It depends on the dog’s own immunity and resistance. , it is best to vaccinate your dog on time, strengthen nutritional supplements, and improve resistance. Dogs that have not been vaccinated should try to reduce their contact with the outside world to avoid getting infected with parvovirus. You need to pay more attention to hygiene and diet. Do not feed bones, raw meat and other foods. Regularly feeding probiotics or gastrointestinal products can effectively prevent dogs from getting infected with parvovirus.