 puppies being more vulnerable to because they tend not to have as much immunity to it. Thankfully, there is a vaccine, as you mentioned, but that vaccine needs to be started young, so as early as four weeks of age. But most of us getting our puppies around eight to 10 weeks of age need to get our puppies vaccinated right away. And then a lot of people don't realize that vaccine needs to be boosted every three to four weeks and then redone every one to three years, depending on the vaccine.