Age 20.
Certain breeds that are more susceptible to parvo we may continue boosters until age 20 or so, but Shitzus are not not one of these susceptible breeds. Then, they will be good for one year. At one year of age (actually approx 1 year and 4 months) , they should receive a booster that will last one year again. My answer may be different depending on what how complete their puppy vaccination series and the timing of the last vaccine-if you can tell me more specifically what vaccines each dog has received and their age at the time of the vaccines, I can answer your question better. Dr. B., Veterinarian. Category: Pet. Report Abuse. I never have, like any other disease parvo can develop an immunity to the vaccine and when your dog actually gets it it won't be able to fight it. I've seen parvo in several dogs, it killed 5 puppies and one 6 month old pup, but one of the older dogs (around 1) got it too and was just ill for a bit. Best Answer: Parvo is a puppy disease so its extremely unlikely they will get it at their age however the vaccines also cover other diseases (distemper, parainfluenza, etc) its recommended they get vaccinated once a year. I am about to go on a road trip to New Mexico with Mommy and Daddy. There might be 'Rez Dogs' that are unvaccinated and die of parvo in the area. According to my vet I am due for a parvo vaccination. I think I had one last year, but I am not 100% sure. I am eight years old and I have heard that some vaccines last a long time, especially for mature dogs Vaccine is given in two doses, 2 to 4 weeks apart, in dogs older than 12 weeks of age. Revaccination is recommended annually, but only for dogs with reasonable risk of exposure. Notes: Vaccination should be based on known geographic occurrence/prevalence and exposure risk of the individual dog. Vaccine is given in two doses, 2 to 4 weeks apart, in dogs older than 6 weeks. Annual revaccination is recommended. Vaccine is given in two doses, 2 to 4 weeks apart, in dogs older than 12 weeks of age. Revaccination is recommended annually and/or at the beginning of tick season as determined regionally. Best Answer: You can ask your vet to do a titers test. This will show what levels and how much of the vaccines are still in the dogs systems. I've gone two years without vaccines and the initial puppy vaccines are still showing at a good level. Some studies have shown different vaccines lasting almost ten years. After that, there is a lot of debate about how long vaccines last. It is different for every dog. You do not have a choice about the rabies vaccine. Since rabies is such a serious disease and transmissible to humans, the rabies vaccine schedule is mandated by local law. They should each receive one distemper/parvo vaccination and that should be boostered in one month. They can also receive a rabies vaccination at either of these visits. The Rabies vaccine does not need to be boostered in one month. If you find out that they were at least 4 months of age at the time of the the last puppy vaccine and even if they have had no vaccines in the interim, then one distemper/parvo vaccine along with the rabies should be sufficient. Dr. B., Veterinarian. My answer may be different depending on what how complete their puppy vaccination series and the timing of the last vaccine-if you can tell me more specifically what vaccines each dog has received and their age at the time of the vaccines, I can answer your question better. Dr. B., Veterinarian. Category: Pet. All puppy vaccines do need to be boostered again at one year of age. After that, there is a lot of debate about how long vaccines last. It is different for every dog. You do not have a choice about the rabies vaccine. Since rabies is such a serious disease and transmissible to humans, the rabies vaccine schedule is mandated by local law. For puppies less than 4 months of age: Puppies less than 16 weeks of age should receive distemper combination vaccinations consistent with the puppy vaccination schedule. A minimum of two vaccinations should be given at a 3-4 week interval, with the last vaccine in the series being given at 16 weeks of age or later. Revaccination should occur one year after completion of the series and then as recommended by the local veterinarian and vaccine manufacturer. Vaccinations should start at 6 weeks of age, and be boostered at 9, 12, and 16 weeks of age. Some veterinarians also booster at 20 weeks, depending on the breed and Parvovirus risk in your area. Speak with your veterinarian about what vaccination protocol is the best for your pet and your lifestyle. 
http://www.justanswer.com/pet/0pm62-often-does-pet-need-recieve-parvo-shots.html https://answers.yahoo.com/question/index?qid=20130612103657AAKfyHQ http://www.dogster.com/forums/Dog_Health/thread/422729 http://healthypets.mercola.com/sites/healthypets/archive/2011/10/27/new-canine-vaccination-guidelines.aspx https://answers.yahoo.com/question/index?qid=20090708183417AA6iusd http://www.justanswer.com/pet/0pm62-often-does-pet-need-recieve-parvo-shots.html https://answers.yahoo.com/question/index?qid=20090708183417AA6iusd http://www.peteducation.com/article.cfm?c=2+2115&aid=968 http://vetmedicine.about.com/cs/dognz/a/parvodog_2.htm
how long does a parvo vaccination last