I'd hold off giving it until you have the new drinkers Zeeteecee. The first re-fill of a drinker in a new month has ACV at 1%. I have noticed it removes some worms when given occasionally. When we gave it continuously it did the first time and then the worms became resistant to the higher gut acidity, plus it costs a lot and we saw no benefit. We worm with Flubenvet regularly as well.