As someone who has Marek's in their flock I can sympathise. I knew as soon as I read that Susete had one eye half closed what was coming. So many people miss such a subtle sign of it or don't think anything of it, so you did well to spot it at that early stage.
I'm not convinced that the problem you have is lice (I wonder if it may be ticks or similar due to the tall vegetation or that putting their spent bedding in your garden is a problem. It makes good compost and many of us do that, so don't beat yourself up that you are doing anything wrong. I am in the UK and I use a product called Nettex Total Mite Kill which contains permethrin and works for lice as well as mites. It comes in a ready mixed spray gun or a bottle of concentrate)which is better value) that you mix with water and spray. It is suitable for use on the chickens and coop. I don't know if you might be able to get that on Amazon.
Apple Cider Vinegar will do nothing for lice so don't get your hopes up. I'm not saying that it doesn't have health benefits and I use it myself but it is not a miracle cure for anything.
Unfortunately you have hit a run of bad luck, although Marek's is so widespread that you might be more correct to consider yourself lucky if you don't have it, rather than unlucky to have it. Try not to let it get you down. You did the right thing for Susete. I put them down once they stop eating. If Lisete is showing signs and you might be right if you saw her with a dropped wing, the important thing is to keep her happy and stress free. Support her immune system with a poultry vitamin supplement and perhaps consider fermenting their feed or use a probiotic. I have tried various herbal/homeopathic treatments and the stress of trying to make them take a tablet or eat medication in their food just makes them worse or discourages them from eating. Antibiotics upset their digestive system and that can make them worse, so I try to give them nutritious easy to digest food....occasional scrambled eggs, small slivers of animal liver, tuna etc and wet mash or fermented feed made with their pellets or better still unmedicated chick crumbs as they are higher in protein and water and a vitamin supplement. In the UK I use Nettex Nutri Drops which come in a little bottle with a dropper.
I would like to point out that Terramycin will not treat Coccidiosis and misuse of antibiotics can be harmful, so try to be more reserved about using them without due cause. I would be interested to know what the "treatment" was that the vet gave you for Marek's. I am unaware of any medication that would be beneficial. Can you post a photo of it showing the name and active ingredient.
I hope some of the above information is helpful and you are able to keep Laudete and Lisete healthy.
I'm not convinced that the problem you have is lice (I wonder if it may be ticks or similar due to the tall vegetation or that putting their spent bedding in your garden is a problem. It makes good compost and many of us do that, so don't beat yourself up that you are doing anything wrong. I am in the UK and I use a product called Nettex Total Mite Kill which contains permethrin and works for lice as well as mites. It comes in a ready mixed spray gun or a bottle of concentrate)which is better value) that you mix with water and spray. It is suitable for use on the chickens and coop. I don't know if you might be able to get that on Amazon.
Apple Cider Vinegar will do nothing for lice so don't get your hopes up. I'm not saying that it doesn't have health benefits and I use it myself but it is not a miracle cure for anything.
Unfortunately you have hit a run of bad luck, although Marek's is so widespread that you might be more correct to consider yourself lucky if you don't have it, rather than unlucky to have it. Try not to let it get you down. You did the right thing for Susete. I put them down once they stop eating. If Lisete is showing signs and you might be right if you saw her with a dropped wing, the important thing is to keep her happy and stress free. Support her immune system with a poultry vitamin supplement and perhaps consider fermenting their feed or use a probiotic. I have tried various herbal/homeopathic treatments and the stress of trying to make them take a tablet or eat medication in their food just makes them worse or discourages them from eating. Antibiotics upset their digestive system and that can make them worse, so I try to give them nutritious easy to digest food....occasional scrambled eggs, small slivers of animal liver, tuna etc and wet mash or fermented feed made with their pellets or better still unmedicated chick crumbs as they are higher in protein and water and a vitamin supplement. In the UK I use Nettex Nutri Drops which come in a little bottle with a dropper.
I would like to point out that Terramycin will not treat Coccidiosis and misuse of antibiotics can be harmful, so try to be more reserved about using them without due cause. I would be interested to know what the "treatment" was that the vet gave you for Marek's. I am unaware of any medication that would be beneficial. Can you post a photo of it showing the name and active ingredient.
I hope some of the above information is helpful and you are able to keep Laudete and Lisete healthy.