Ivermectin Studies:
http://www.ncbi.nlm.nih.gov/pubmed/2816174
Ivermectin as a bird anthelmintic--trials with naturally infected domestic fowl.
Oksanen A, Nikander S.
Abstract
To evaluate the use of ivermectin as a bird anthelmintic, 29 White Leghorn hens naturally infected with Ascaridia...
Place 10ml amount of your ivermectin in a glass of water, stir well and wait... I bet it will do like mine did and float to the top. Not sure where Merck got their info from, but the 1% ivermectin I tested floats on water.
-Kathy
Studies show that ivermectin is not an effective poultry wormer unless high doses are given. There are also many posts here on BYC with necropsy pictures from people who thought it was an effective wormer.
@SandyNest , if you suspect worms and cannot get have a fecal float done, get some...