Hi Morris,
I just sent this email to Jerry Hayes:
 
Hi Jerry
In your Sept Classroom you state that Tylan comes in a 100 gram bottle. 
This is not correct--it comes in a bottle with "Equivalent to 100 g tylosin
base."  I have spoken with the manufacturer, and they do not standardize the
weight of the excipients, as is done with, say, Terramycin Soluble Powder. 

If you consult the manufacturer's sheet sold with the product, you'll see
that the entire contents of the bottle should mix with 22 lbs of powdered sugar.

In order to dose Tylan properly, one must weigh the contents of the entire
bottle, and divide that amount by the convenient unit of, say, 11 (I put
those 11th portions in ziplock bags).  Each 11th portion mixes with 2 pounds
of powdered sugar (an off-the-shelf unit).  The proper per-colony dose is
then 1/4 cup. 

Keep up the great column,
Randy Oliver

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