Hello there, @topdogpettraining.

Welcome to the Community space. As mentioned by BRC, you can create a custom field for the dog's name. I'll show you how:

1. Click Customers.
2. Choose Customer Center.
3. Under the Customers & Jobs tab, double-click the customer name.
4. Go to the Additional Info tab.
5. Click Define Fields.
6. Add a field for Dog name.
7. Click OK.
8. On the designated field, enter the dog's name.
9. Click OK to save changes.

That's it. Let me know if there's anything else you need or you have additional questions about customers. I'm still here to help you further. Have a good one!