Growler, what an amazing mommy you are.
All your research has definitely paid off.
I'm glad to hear that Duffy's re-check had such good results.
I understand about the teeth brushing though.....mine are the same way and I tend to "forget" to do it.
I just read something yesterday that may help. It said to use a Q-Tip instead of a toothbrush for cats as it's not as irritating to them. I haven't done it yet but it might be worth a try.