That's great , any problems/issues with anything ? Any tips ?
		
		
	 
No problems and no side effects yet. I read that they might get pasty butt, so I’ll keep an eye out for that. After the shot they ate, played and went to bed for the night as usual.
This website has useful instructions with pictures:
https://backyardpoultry.iamcountrys...inister-the-mareks-vaccine-to-poultry-chicks/
Tips (not covered in the above article). This is a two person job, especially if you haven’t done it before. If you’re right handed, have the other person hold the chick in front of you, with its head pointing to your right. With your left hand, pinch the skin behind the neck, and with your right, insert the needle in the skin fold. The direction of the chick matters because this way the needle will point away from its head, so in case it jumps, you won't stab its little skull.
The instructions say to do it when the chicks are one day old. Technically, as long as they haven't been exposed to the virus and are "clean", they can be vaccinated whenever, but new chicks are clean for sure, hence the vaccination after hatch vs. later. I got delayed because I was waiting on the owner of the other chicks to make up her mind, so mine were 3 days old when I gave them the shot. Not a big deal, BUT, if you can, I'd recommend doing it at 1 day old. The reason is because a 1 day old chick is still pretty weak and slow. By 3 days old, they kick and pull and put up a good fight! So it's just easier when they're 1 day old.
The vaccine from Meyer comes with one 1ml syringe. But the instructions ask for that plus a 3ml syringe, which I did not have. I assumed it came with everything I'd need... Not a big deal and I made it work, but the 3ml syringe would've made things easier. It's because at one point you need to draw 3ml of the diluent, and with a 1ml needle, you just have to do it three times.
Do the whole procedure over a waterproof surface or something you can wipe easily that won't get ruined, because the diluent comes in a bag and after a few stabs, it starts to leak everywhere, and it's orange, so it stains.
That's all I can think of. It was pretty fast and easy. Good luck, and let me know if I can help in any way!