Lethargic chicken, off food, pale face & comb

[JLMP]

Not right now, deal with the respiratory issue first. But yes, the ivermectin should be repeated 2 weeks after the first dose. You can treat the other hens, and get some Permethrin spray, clean out the coop and spray it down with that. Support the sick girl with good nutrition, ( not corn) you can soak her layer food to make a mash if she's not eating well, and leave her be until you hear from some of the experienced medical experts here. She may need antibiotics.

Great thanks

 

[Wyorp Rock]

mainly fed on mixed poultry corn and layers pellets, but also get black sunflower seeds, linseeds and fruit &veg (cabbage, kale, butternut squash, carrot peelings, melon, apple etc) as well as foraging on grass during day.

On 7th April, we treated them all with 4 drops fenbendazole administered orally and 4 drops ivermectin applied topically for any internal / external parasites.

Your pullet looks to have a respiratory infection.
Is there a bad odor? If there is, then likely Infectious Coryza, you will need a Sulfa Antibiotic to help treat symptoms.
If no odor, then treat as Mycoplasma, you can use Tylan/Tylosin.

Get a Permethrin based poultry dust or spray and treat all your flock for lice. DE is not going to be an effective treatment for ridding the infestation. Treat your birds and coop/housing in 7 day intervals with the Permethrin.

4 drops of Fenbendazole and Ivermectin is not going to do anything.
Both are dosed by weight.

For roundworms only give Fenbendazole at 0.23ml per pound of weight orally once, then repeat in10 days.
For other worms including roundworms, but excluding tapeworms, give Fenbendazole at 0.23ml per pound of weight orally for 5 days in a row, no repeat.

Ivermectin Pour On dose is 0.09ml per pound of weight applied to the base of the neck along the spine making contact with the skin. Repeat in 10 days.

Flush her eye with saline, press out the pus and apply Terramycin eye ointment into the eye. Do this a couple of times a day.

Get her on her normal feed, cut out some of the scraps, seeds and corn. Give her some extra protein like fish, egg or meat or you can feed her chick starter or all flock. Poultry Vitamins given orally once a day for several days wouldn't hurt either.

Here's some reading about respiratory illnesses https://edis.ifas.ufl.edu/publication/ps044

 

[JLMP]

Your pullet looks to have a respiratory infection.
Is there a bad odor? If there is, then likely Infectious Coryza, you will need a Sulfa Antibiotic to help treat symptoms.
If no odor, then treat as Mycoplasma, you can use Tylan/Tylosin.

Get a Permethrin based poultry dust or spray and treat all your flock for lice. DE is not going to be an effective treatment for ridding the infestation. Treat your birds and coop/housing in 7 day intervals with the Permethrin.

4 drops of Fenbendazole and Ivermectin is not going to do anything.
Both are dosed by weight.

For roundworms only give Fenbendazole at 0.23ml per pound of weight orally once, then repeat in10 days.
For other worms including roundworms, but excluding tapeworms, give Fenbendazole at 0.23ml per pound of weight orally for 5 days in a row, no repeat.

Ivermectin Pour On dose is 0.09ml per pound of weight applied to the base of the neck along the spine making contact with the skin. Repeat in 10 days.

Flush her eye with saline, press out the pus and apply Terramycin eye ointment into the eye. Do this a couple of times a day.

Get her on her normal feed, cut out some of the scraps, seeds and corn. Give her some extra protein like fish, egg or meat or you can feed her chick starter or all flock. Poultry Vitamins given orally once a day for several days wouldn't hurt either.

Here's some reading about respiratory illnesses https://edis.ifas.ufl.edu/publication/ps044

No odour so will treat as Mycoplasma. Thank you very much

 

[Eggcessive]

Very good advice from Wyorp Rock.
Tylan 50 injectable (use it orally) is available at some feed stores. Tylosin powder for treating the water is available here:
https://jedds.com/products/tylosin-powder