I have a 1 gal waterer and am medicating with denagard. I have a small flock and they drink about half the gallon in a day. I know Duramicin is unstable after 24 hours and you have to change out the water hence losing the meds in the wasted water. Is it the same with denagard? This isn't a big deal with a 5 dollar pack or Duramicin; but I hate to unnecessarily throw away meds that cost $50. and yes I could just mix up a half gal at a time but I want to make sure they have plenty of water cause its like 100 degrees here.