i have no idea what a Post Tread means. but I have three house ducks. One Pekin and Two runners. Yes they go out side too. but im scared something will eat them and it will hurt my heart if anything happend to them. One of them has bumblefoot and we are treating it. but now her eyes are bubbling? is their an other treat ment i need to know. Someone told me to put 1 table spoon in to one gallon. is their more I can do. I cant lose her