We use the PetzLife too! We get it at sassypup.net since I think that's the best deal on it I've seen anyhow
.
I try to do it 3 times a week and I attempt to brush, but sometimes it happens and sometimes it doesn't
. I actually use a tiny bit of gauze instead of a toothbrush or fingerbrush because to me they seem too clumsy and I can't get in there well!
I have the mint flavor and two of mine love it, and two don't