Eastland :

There is a post on here about 10 geese = one cow and all the related bad effects of geese around a pond. I will try to locate it and post. For ducks I would divide the # of ducks by 3 and get 30 ducks = one cow.

Boy that was a quick find. As Bill says they are "flying toilets".


http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=20;t=001634