We recommend that puppy and kitten vaccines be started at 8-10 weeks of age. In some cases vaccines may be started as early as 6 weeks old. To achieve proper immunity a series of vaccines are given every 3-4 weeks until they are 16 weeks old. There may be some variation from pet to pet. To maintain protection these injections are boostered every 1-3 years depending on the vaccine. Visit our Routine Care section under services for more information on vaccines.