Thank you! That's a great article about medicating a peafowl. I haven't dosed any kind of bird this way in many, many years, so this has been a great help. He's been difficult to dose as he has a lot of phlegm in the back of his throat, but he's swallowing well which has helped a lot. I just hope the antibiotics help. If it's viral we'll be back at the vet for other treatments on Monday. I got 2 kinds of lice treatment: a powder to dose him and a spray to do the cage to prevent them spreading to our chickens that are fairly nearby. This morning he was still looking pretty miserable and making no effort to eat or drink on his own.
Would it be a good idea to get some yoghurt into his diet once he's finished with the antibiotics? I figure replenishing good microbial flora has to be a good for him as it is for us.