Before the raw diet - dozens of times a year, easily. Especially when I worked at a vet, I would take them in for any little thing since I had a 50% discount on the bills.

After the raw diet - I'm predicting once a year, since they have only gone for routine things (vaccines, which I have since stopped) since starting the diet almost 6 months ago. Mandy and Nova were "problem children", always at the vet, but not anymore!