Thanks Free Spirit. I have Indian Runner Ducks. They don't like to be handeled so I want to keep this as stress free as possible. I wan't to do Corid in thier water. I'm going to start with 1 ml per liter. I don't think that is too much but not sure if it is enough. The Valbazen link you sent referenced chickens and I'm not positive that chickens and ducks take the same amount. Do you have ducks? And have you treated them with Valbazen at chicken doses? Sorry I don't mean to question it's just I've been down the sick duck road before and 3 out of 3 vets told me different things. I'm looking for real people who have ducks and know what has worked for them. Thank you for helping!