Didn't make a difference

Bought this hoping it would help with my Boston's stinky breath. Been trying it for a few weeks now and I can honestly say it hasn't made a difference whatsoever. At $3.99 CDN on sale at Ren's it was worth a try for a good size bottle, you don't have to use much of it, so it should last awhile. I will continue to use it however it says you should notice a difference in a week but that hasn't happened.