I have a 1yr old Serama roo that seems to have a cold. He shakes his head, sneezes sometimes, and sounds very hoarse when he's attempting to crow. Usually he's my loudest. You can see him open and close his mouth sometimes and hear the congestion once in awhile. I've been using VetRX and it helps some but it's not making it go away. His little comb is turning purple in the back from time to time. It seemed like it started after the AC had to kick on more frequently (my Seramas stay inside) but the hen inside his pen is perfectly fine so I'm assuming it's not contagious since he's been this way about a week and a half. It isn't getting any worse, just not better either. Also he eats, drinks, flies around and acts perfectly normal aside from above. I'm headed to the feed store here in a bit. Can anyone tell me what I should get for him? I'm really nervous about giving injections so I'd prefer to do something via the mouth or water. I can get Tylan injectible or tablets for sure and probably Terramycin. Our store is somewhat limited on meds unfortunately. Thanks in advance yall. I appreciate it.