Yes, orally means down his throat. When giving amoxicillin I mix the appropriate dose with a bit of coconut oil, refrigerate until hard, and give like a custom pill. Amoxicillin will settle out when mixed in water, adding it to drinking water won't give the correct dose. You can also mix it with something like liverwurst and feed it. You have to make sure he gets the whole dose. You also need to give it every 8-12 hours. If you can catch him tonight when he is roosting, then keep him in a wire crate in the run where he can still see and be seen by the other birds, keep him there until you have completed treatment if he's too hard to catch each time. For difficult birds, catch after dark, and then wrap in a towel like a burrito while handling them to help you and minimize hurting them. Pull down on his wattles, give the medication and let go of the wattles and let him swallow. If he has a respiratory infection then you may need to use something like Tylan instead of amoxicillin. If you don't see improvement with the amoxicillin, you may need to switch to something else.
