Im treating my 8 week old silkie with Tylan 50 and on day 3 for upper respiratory infection. He/she got pretty lethargic and eyes swollen shut. That bird is doing alot better but... Do i go ahead and start treatment on any other birds at the 1st sign of a watery eye or a sneeze... Or do i wait to see if it gets worse? I have the sick one up at the house for monitoring so hes not in general pop. Everyone else seems to be fine... Eating drinking and running amuck but i swore i heard my other silkie sneeze. TIA.