Don’t really know how much she weighs she’s a Rhodes island red and she almost 2 years oldHow much does she weigh? Tylan can be given 0.25 ml or 1/4 ml per pound. 3/4 ml would treat a 3 pound chicken. Remove the needle to give it. It can be given in higher doses as well in severe infections. Give it 3 to 4 times a day if you can manage for 3-5 days.