Just give the Tylan 50 by mouth then. They get a proper dose, when putting medicines into the water, they have to drink a normal amount of water for it to help. And I would advise you to only treat birds who are ill, and separate them from the others.I'm a little bit scared to give injections. Do you think Terra-Vet 10 in water might work and would be a good start and be safe for all the chickens and my ducks?