If you ever need to update the age of your pet on their pet profile, you can easily do so via the Crumb App. Here's how:
Open up the Crumb App, and click on your pet
If you aren't already signed in, Crumb will prompt you to send a verification code. Click on the profile of the pet whose age you'd like to edit. If you don't see the right pet, you can swipe left or right until you find them.
Select "Edit Pet Details"
Update their date of birth
Click on save when you're done!