I recently purchased a bottle of the Denagard 12.5% (tiamulin hydrogen fumarate). I have a couple questions for those who use it to treat their chickens. My first question is in regards to dosage. Is 1 tablespoon per gallon of water the correct treatment dosage? My second question is whether or not the entire flock can be given the treatment dosage when only a few chickens have symptoms at this time.