I usually don't booster until a year after the last puppy vaccination and then don't again for 3 years
There is a lot of new info from Veterinary Colleges that there has been health problems from overvaccinations, ie every year. It challenges the immune system with something they already have plenty of immunity for which is the drift of the findings. The result is increased blood disorders, ie leukemia, kidney and liver problems, addison/cushings increases, diabetes.
THis is for both cats and dogs and now it is strongly suspected it is from the annual vaccination. |