Hope it goes well
Thank you Harmony.
I set up a hurdle fastened to two well sunk fence posts about two feet away from a strong fence. I put a small hinged hurdle over the exit end and set up a funnel into the other. I fastened a small food bowl half-way up the hinged hurdle so the pig's head would be up to make injecting behind the ear easier. I know it is all common sense really but I was anxious he would become distressed by an injection.
When I slid in the first giant needle he did not bat an eyelid so I was able to administer the second one shortly after. he decided to back out of the race, rather than proceed out of the provided exit, in spite of having a dodgy leg which is the reason for the antibiotic and pain killer. Hopefully tomorrow he will associate this set up with good things, ie food, rather than being repeatedly stabbed.