Hello Haunted55 and thank you for the comprehensive reply, The hens looked perfectly healthy at the animal sanctuary yes. Poop ,eyes and feathers all fine. I have now 7 of the 8 seven week old chicks and the two POL hens who I bought in from the sanctuary. The chicks were kept in my spare room for the first 6 weeks of there lives and then I was forced to put them outside due to there size and mess making! They live next door to my adult birds which is very worrying but I have no way of moving them as there is nowhere else for them to go. They are divided by chicken wire alone until I can find something to cover the partition. The 8 week old chicks came from a totally separate smallholding as day olds and the chick which died was the last to be born and always the smallest. My coop and the two chicken houses are brand new and mould free. The run is also very clean with chipped bark. The first vet visit (2 POL hens) was diagnosed as Mycoplasma and scaly leg, they had injections for both and anti-biotics for a week as a powder. The second vet visit was just one of the two hens as she hadn't stopped sneezing. Both hens have now had home administered injections for lungworm?! (cause of secondary infection?)and drops put on there backs for scaly leg(ivermectin).
I am literally so tired of worrying about them and it has become something of a nightmare. watching the chick die in such a violent way has made me feel very sad and fearful it may happen to any of them at any time. I have to inject the two POL hens again tomorrow and Wednesday and am very fearful of doing this as it causes all of them stress and panic.
I have no idea about lungworm and hope someone who does or can research chimes in here. Have you tried just putting vaseline on their legs? It smothers the mites. If they are separated by chicken wire, chances are they've been exposed already so no need to worry anymore....what's done is done. Now it's just watch and if you see any of the symptoms in the chicks, treat. That's about it.
http://chat.allotment.org/index.php?topic=4348.0
http://www.purtonvets.co.uk/purtonblog/2011/04/lungworm.html This one has a Chicken Vet section I thought you might like.
Gape worms...When your Vet is done with the treatment, you will need to start one on your own. Yearly, quarterly, bi-monthly, however many times you need for your enviroment, you will need to give a wormer to your chickens. No idea what you can get there from a farm store, or if you have to purchase it from the Vet. You will also need to get something to treat them and their housing for mites and lice. I use Sevin dust for mine. Again, not sure what is available to you. These are just regular maintenance things you need to do.
As for the stress and panic...if and when I have to finally give shots to my birds, I would be going out there with bread in hand. Mine love bread and actually beg for it everday! Trust me, it ain't pretty. One of my hens will actually sit on my foot and stay there unless she is given some...brat. Walking doesn't dislodge her, she just hangs on and flaps her wings. The point is, find something they like and offer it to them. Once they're calm, because they got their treat, then you may be able to snatch and do the shot before too much fuss is made. They'll also pick up on what you're feeling so calm is the word. I also just make up stupid little songs as I'm treating mine for whatever. They like it. Goofy buggers, lol. They don't care what you're saying, just that you're paying attention and making a new sound for them.