three of my hens have canker. I’m going away on the tenth of August and I cannot leave it untreated. I have sitters that will be caring for the chickens, but prying open the hens mouths is a real challenge sometimes and I don’t know if they can do it. I was wondering if I could put anything in their water to at least hold it at bay right where it is so that I can continue treatment when I return (on the 24th)?