It can be easiest to get them off the roost just before daylight and after dark when back on the roosts at night to medicate or examine. I use a head lamp with the red light on, to sneak into the coop without awaking everyone. But the Tylan is given 3 times a day, and so you will need to give it...
Tylan is given for 3-5 days. Dosage of Tylan 200 is 0.05 ml per pound of weight given 3 times an day, and I would give it orally to chickens and turkeys. If you can get a 1 ml syringe that would make dosing easier.
Panacur or SafeGuard dosage is 0.23 ml per pound given for 5 consecutive days...