If they're currently healthy with no plaque build-up, you don't need to use it every day. I used Petzlife daily until I was able to brush away all the plaque and tartar build-up, but now for maintainence, I just use it and brush once a week, plus I give dental chews and bully sticks. Petzlife is safe and effective, I'd definintely recommend it!
Hope that helps!
