Tylan 50 injectable can be given 1/4 ml for a bantam, 1/2 ml for a small chicken under 5 lb, and 1 ml to a chicken 5 lb and over, once or twice and day for 3-5 days. If given orally, I would use it twice a day, and as an injection into the breast muscle, once a day. Use a 22 gauge needle, and inject only 1/4 inch into breast muscle, alternating sides daily. Egg withdrawal time is 1 days for oral Tylan and 7 days for the injectable.