Generally, no. The genetic variants we analyse remain the same throughout your pet's life, so there's no need to repeat the test to examine them again. What can change, however, is how the results are interpreted as scientific knowledge advances, and you'll see these updates in your account.
Another sample may be needed in specific cases: to confirm a finding, resolve an issue with the sample or carry out an analysis using a different technology. In any case, the test doesn't replace veterinary check-ups at each stage of your pet's life.